(If there is a similar blog like this,please link it in the comment.I don't want blogs about practicing or anything else.I want blogs on how to perfectly AC a problem)

I was discussing with my IGM friend about an interesting problem.It was a really fun discussion.He helped me do it and also mention something that i am really curious on how to fix it:

"You always solve problems partially correct,the rest of your solution is just so random i believe you don't even know how to go back"

I was trying to solve 2000 rated problems in this week but i failed miserably.In the first 5 mins i managed to find the first major idea of the solution.Then,i strayed.When i was trying to actually implement my idea,i used data structures or tricks that are irrelevant to the problem.I'm trying to practice but the problem is that my practice tells me i won't solve this problem.

I need a genuine help,thanks!