Sounds like you escaping negative Emotions with gaming(like I did). Good Job realizing it.
I get the point about blocking Apps. It didn't help me either. But deleting my LoL-Account in the others Hand... If I didn't do this, I am sure I would still relapse in this Game. I played many games afterwards to escape (warcraft3, Dota, Hearthstone, etc...) but no game was as successful in short-circuiting my brain as LoL. Also uninstalling is not only about the barrier, it mainly circumvents opening the game in autopilot. I.e. Trying to study, bad feelings arise, open window search, type in Lol, ... and nothing comes up? Right, I uninstalled it.
Especially with the rune system in LoL it makes the game less attractive if you don't play with full runes in my opinion. So delete your account if you want to stop playing it. It helps a bit.
My story if its interests you: didn't play LoL since 2017. I relapsed with gaming and mindlessly browsing, porn, youtube, etc... but never LoL. Alone this made a major difference in my life. Now I married my girlfriend (who nearly left me because I played all the time instead of studying while she was at work and was really stressed out because of it), have two sons, and found a job in a fundamentally different industry (IT) then what I originally studied (chemical engineering). And I am still struggling with many things. I am still way better off then I would be if continued gaming LoL year over year. It is worth it.
I am currently detoxing from gaming and gaming content on youtube and doing journaling daily too. I will swing by here from time to time.
With a clear brain and Attention available, you will figure out a way forward. Best of luck.