First of all congratulations for keeping a record worthy backlogs. I also faced the same situation once but still worse than you.

My gf left me, my parents were rude to me, relatives started commenting me badly, can't enjoy success parties thrown by my friends, literally not in a situation to show my face to anyone.

Starting motivating myself, Joined in private classes, reduced the time spending on internet, instead started watching youtube videos related to subjects in Btech and finally passed all Btech subjects by end of final year.