I had spend 2 years at 2nl Pokerstars. I even have some random bizzare cringe videos but i remember some people would find me at the tables and they would say "thanks to them now i can easily win".
1) Transition to GGpoker, Pokerstars does not respect you, at GG you will have better rakeback better offers
2) Do not worry about GTO ranges that much for now, they are barely related for why you lose , as i see from the one graph you are doing the opposite of what you must do at this limit, having positive redline at 2nl might even be a negative thing, at micro stakes you win by value betting hard and gettin called, not by making others fold too much.
3) I do not have more information to help you more but i am sure you are calling rivers extremely light when the others never bluff and just have the nuts all the time, like the QQ hand when the villain shoves there it is 95%+ a full house.
4) There are people who go by GTO and stuff at the forums, and they lose, and there are people who just accept that other people are bad and see them for what they are and play them for what they are, when you learn to fold and accept that yes he had it anyway and you dont even have to question it that much you will be a boss in the micro stakes. It is not that simple because it might not apply to every player and every spot but its a good blueprint to start with and go for higher accuracy from there.
5) Look the mirror, say ten times they always have it, then say, i do not bluffcatch i just value bet hard my own good hands and thats it, you will win 10bb/100 at 2nl if not more.
https://www.youtube.com/watch?v=QgFkxciKVrU&t=3s this is old but i dont think anything changes ever so much,