After brainstorming very much I somehow went to conclude that this might be because of new Big Sur update which I did on night before this problem occurred, and as soon as I searched for it over the internet I found that I'm not alone in this.
There are many stories out there of people who faced it in various version updates of Mac OS though there's no exact solution to this problem the only thing that apple service provider suggest it either a screen default or Mother board.
Repairing it would have costed me any how not less that 45,000 INR, I was not in a state to spend another 45,000 from my education loan which is getting way higher due to the Interest, so I compromised with the situation and started working on same blinking screen laptop but now after one year of using it in same way it has now become very hard for me to continue working on it, I've been facing several problems like eye strain and stress from past few months.
I request you all to please help me by raising some funds to me so that I can get my laptop repaired.
Things I've attached :
1.) Proof of the problem that I'm facing
2.) My education loan papers. (for privacy reasons hidden my institute name, my address and loan reference number )
P.S. you may not actually see blinking effect in a picture ( it's hard to capture blinking in a picture) so please refer to video link provided.