How can I fix this?

Question

How to produce the following table in LaTex:

I tried the following:

\documentclass[10pt, a4paper]{article}

%Some packages I commonly use.

\usepackage{graphicx}
\usepackage[colorlinks]{hyperref}

\usepackage{xcolor} %For coloring texts and objects

\usepackage{enumerate}
\usepackage{enumitem}
\usepackage{booktabs}
\usepackage{multicol}
\usepackage{multirow}

\usepackage{amssymb}
\usepackage[utf8]{inputenc} % to allow characters beyond ASCII (e.g. à, ü, č ...)
\usepackage[top=1 in,bottom=1in, left=1 in, right=1 in]{geometry}
\usepackage{lipsum}
%\usepackage{authblk} %For Author Titling and affiliating Purpose

\begin{document}
    \begin{tabular}{ |p{2.5cm}|p{2cm}|p{2cm}|p{2cm}|p{1.2cm}|p{1.2cm}|p{3cm}|}
        \hline
        \multirow{2}{*}{Name of Student / Teacher} & 
        \multirow{2}{*}{Years of Study} & 
        \multicolumn{2}{c|}{Subjects} &
        \multirow{2}{*}{Years of Passing} &
        \multirow{2}{*}{Class/rank /distinction} &
        \multirow{2}{*}{University/ Institute} \\
        \cline{3-4}& & Main & Subsidiary & & & \\
        \hline
        
        Science & 2013-2016 & Mathematics & Physcs, Chemistry & 1929 &  & Name of the University Here\\
        \hline
        Name & 2016-2018 & Biology & Chems & 1997 &   & University Name Here\\
        \hline
        (Last item) & & & & & &\\
        \hline
    \end{tabular}
\end{document}

But my texts in the cells are getting overlapped with each other.

My Output

How can I fix this? Thanks.

EDIT As suggested in the comments I modified it as follows

\documentclass[10pt, a4paper]{article}

%Some packages I commonly use.

\usepackage{graphicx}
\usepackage[colorlinks]{hyperref}

\usepackage{xcolor} %For coloring texts and objects

\usepackage{enumerate}
\usepackage{enumitem}
\usepackage{booktabs}
\usepackage{multicol}
\usepackage{multirow}

\usepackage{amssymb}
\usepackage[utf8]{inputenc} % to allow characters beyond ASCII (e.g. à, ü, č ...)
\usepackage[top=1 in,bottom=1in, left=1 in, right=1 in]{geometry}
\usepackage{lipsum}
%\usepackage{authblk} %For Author Titling and affiliating Purpose

\begin{document}
    \begin{tabular}{ |p{2.5cm}|p{2cm}|p{2cm}|p{2cm}|p{1.2cm}|p{1.2cm}|p{3cm}|}
        \hline
        \multirow{2}{=}{Name of Student / Teacher} & 
        \multirow{2}{=}{Years of Study} & 
        \multicolumn{2}{c|}{Subjects} &
        \multirow{2}{=}{Years of Passing} &
        \multirow{2}{=}{Class/rank /distinction} &
        \multirow{2}{=}{University/ Institute} \\
        \cline{3-4}& & Main & Subsidiary & & & \\
        \hline
        
        Science & 2013-2016 & Mathematics & Physcs, Chemistry & 1929 &  & Name of the University Here\\
        \hline
        Name & 2016-2018 & Biology & Chems & 1997 &   & University Name Here\\
        \hline
        (Last item) & & & & & &\\
        \hline
    \end{tabular}
\end{document}

New OUtput

Still it's not that what I want.

Answer 1

As requested a version in which the font size is not altered. In order to make sure, the table fits into the available text width, I used the tabularx package and altered some column widths.

\documentclass[10pt, a4paper]{article}


\usepackage{tabularx}
\usepackage{multirow}
\usepackage[top=1 in,bottom=1in, left=1 in, right=1 in]{geometry}


\begin{document}

\noindent
    \begin{tabularx}{\linewidth}{ |p{1.8cm}|p{2cm}|p{2cm}|p{2cm}|p{1.2cm}|p{1.8cm}|X|}
        \hline
        \multirow{3}{=}{Name of Student / Teacher} & 
        \multirow{3}{=}{Years of Study} & 
        \multicolumn{2}{c|}{Subjects} &
        \multirow{3}{=}{Years of Passing} &
        \multirow{3}{=}{Class/rank /distinction} &
        \multirow{3}{=}{University/ Institute} \\
        \cline{3-4}& & \multirow{2}{=}{Main} & \multirow{2}{=}{Subsidiary} & & & \\
        &&&&&&\\
        \hline
        
        Science & 2013--2016 & Mathematics & Physcs, Chemistry & 1929 &  & Name of the University Here\\
        \hline
        Name & 2016--2018 & Biology & Chems & 1997 &   & University Name Here\\
        \hline
        (Last item) & & & & & &\\
        \hline
    \end{tabularx}
\end{document}

Answer 2

Off-topic:

• the package hyperref should be load the last in the preamble
• don't use enumerate˙ and enumitem` packages, please use only one of them
• don't affray to use some new package which can simplify your code and gives better result

On topic:

• with the tabularray package solution is quite simple:

\documentclass{article}
\usepackage[a4paper,
            margin=25mm]{geometry}
\usepackage{tabularray}

\begin{document}
\noindent%
    \begin{tblr}{colspec={|X[1.3]|X[0.8] |X[1.1]|X[0.9] |X[0.8,c]|X[0.8] |X|X[1.5]|},
                 colsep=3pt,
                 rowsep=3pt,
                 hline{1,6}={1pt}, hline{3}=0.6pt,
                 hlines
                }
\multirow{2}{=}{Name of Student/ Teacher} 
    &   \multirow{2}{=}{Years of Study} 
        &   \multicolumn{2}{c|}{Subjects} 
                &   \multirow{2}{=}{Years of Passing}
                    &   \multirow{2}{=}{Class/ rank/ distinction}
                        &   \multirow{2}{=}{University/ Institute} \\
    \cline{3-4}
    &   &   Main 
            &   Subsidiary 
                &   &   &                                           \\
Science 
    & 2013-2016 
        & Mathematics 
            & Physcs, Chemistry 
                & 1929 
                    &   & Name of the University Here               \\
Name 
    & 2016-2018 
        & Biology 
            & Chems 
                & 1997
                    &   & University Name Here                      \\
(Last item) 
    &   &   &   &   &   &                                           \\
    \end{tblr}
\end{document}

(red lines show text borders)

Answer 3

Something like this? (Note: Not a single \multirow as far as the eye can see...)

\documentclass[10pt,a4paper]{article}
%\input{structure} % I don't have access to 'structure.tex'
\usepackage[margin=2.5cm]{geometry} % or whatever is appropriate
\usepackage{array,ragged2e}
\newcolumntype{M}[1]{>{\RaggedRight\hspace{0pt}}p{#1}}
% utility macro for typesetting header cells:
\newcommand\mytab[1]{%
   \smash{\begin{tabular}[t]{@{} M{\hsize} @{}} #1 \end{tabular}}}
   
\begin{document}
\noindent
\begin{tabular}{ |M{2.1cm}|M{1.6cm}|M{1.8cm}|M{1.8cm}|M{1.4cm}|M{2.0cm}|M{2.2cm}|}
        \hline
        \mytab{Name of Student\slash Teacher} & 
        \mytab{Years of Study} & 
        \multicolumn{2}{c|}{Subjects} &
        \mytab{Years of Passing} &
        \mytab{Class\slash rank\slash distinction} &
        \mytab{University\slash Institute} \\
        \cline{3-4}
        & & Main & Subsidiary & & & \\
        \hline
        
        Science & 2013--2016 & Mathematics & Physics, Chemistry & 1929 &  & Name of university here\\
        \hline
        Name & 2016--2018 & Biology & Chems & 1997 &   & University name here\\
        \hline
        (Last item) & & & & & &\\
        \hline
    \end{tabular}
\end{document}