Dissertation formatting help, table of contents

I need some urgent help with my dissertation formatting for the TOC which I am just not able to figure out and have a submission deadline to get my PhD.

I have manually created the TOC (I had to), and need to make the following changes in it:

1. Triple space from title for List of Figures
2. Have double space between each entry EXCEPT multi-line titles.
3. Indent second line if title has two lines or more.

I have tried everything and looked everywhere, but just can’t figure this out. I would SERIOUSLY appreciate any help with this asap.

I am attaching the TeX code. I work on Overleaf.

documentclass[12pt]{article}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
usepackage{amssymb}
usepackage{amsmath}
usepackage{geometry}
usepackage{setspace}
usepackage{endnotes}
usepackage{sectsty}
usepackage{indentfirst}
usepackage{graphicx} % Allows including images
usepackage{footmisc}
usepackage{etoolbox}
setlength{footnotesep}{baselineskip} %use 1.67baselineskip for a double space
usepackage[utf8]{inputenc}
pagenumbering{roman}

setcounter{MaxMatrixCols}{10}


baselineskip = 21pt
renewcommand
baselinestretch{1.5}
newtheorem{defn}{Definition}
geometry{left=1in,right=1in,top=1in,bottom=1in}
doublespacing
makeatletter
def@biblabel#1{hspace*{-labelsep}}
makeatother

renewcommand{contentsname}
    {centering normalsize CONTENTS}


newcommand{addsection}[3]{addtocontents{toc}{protectcontentsline{section}{protectnumberline{#1}#2}{#3}}}
newcommand{addsubsection}[3]{addtocontents{toc}{protectcontentsline{subsection}{protectnumberline{#1}#2}{#3}}}
newcommand{addsubsubsection}[3]{addtocontents{toc}{protectcontentsline{subsubsection}{protectnumberline{#1}#2}{#3}}}


begin{document}

setcounter{page}{7}


% Construct contents
addsection{}{LIST OF FIGURES}{viii}
addsection{}{LIST OF TABLES}{ix}

addsection{}{CHAPTERS}{}

addsection{1}{IT'S A MATCH! OR IS IT? A LAB EXPERIMENT ON MENTORSHIP}{1}
addsubsection{1.1}{Introduction}{1}
addsubsection{1.2}{The Mentorship Experiment: Experiment Design}{7}
addsubsection{1.3}{Treatments}{14}
addsubsection{1.4}{Implementation}{17}
addsubsection{1.5}{Experimental Results}{18}
addsubsection{1.6}{Conclusion}{26}


addsection{2}{ GENDER DIFFERENCES IN TOP LEADERSHIP ROLES: DOES WORKER BACKLASH MATTER?}{45}
addsubsection{2.1}{Introduction}{45}
addsubsection{2.2}{The Leadership Experiment: Experiment Design}{51}
addsubsection{2.3}{Treatments}{54}
addsubsection{2.4}{Implementation}{57}
addsubsection{2.5}{Experimental Results}{58}
addsubsubsection{2.5.1}{Gender differences in the decision to be manager}{59}
addsubsubsection{2.5.2}{Gender differences in managers' decision-making}{62}
addsubsubsection{2.5.3}{Gender differences in leadership style}{67}
addsubsubsection{2.5.4}{Gender differences in the extent of received worker backlash}{68}
addsubsection{2.6}{Conclusion}{70}

addsection{3}{DEGREES OF EQUALITY: WHY ARE THERE FEWER WOMEN IN UNDERGRADUATE ECONOMICS?}{82}
addsubsection{3.1}{Introduction}{82}
addsubsection{3.2}{Literature Review}{83}
addsubsection{3.3}{Experiment Design}{89}
addsubsection{3.4}{Empirical Strategy}{91}
addsubsection{3.5}{Implementation}{92}
addsubsection{3.6}{Results}{93}
addsubsection{3.7}{Strategy for the full scale study}{95}
addsubsection{3.8}{Conclusion}{97}
    
addsection{}{APPENDIX}{106}
addsection{}{BIBLIOGRAPHY}{128}


tableofcontents

end{document}