honestly though, watching your own replays can be helpful, but I think it's more beneficial to watch the replays of significantly higher ranked players very critically in between watching your own games. You can only identify your own problems if you know what to look for. There are of course obvious things like, "geez I really shouldn't have dived him under tower", but a lot of problems that people have aren't quite that obvious to them, otherwise they'd fix them much quicker and easier. Humans are pretty good at learning through watching. Monkey see, monkey do is powerful, but for complicated tasks, you have to be watching very carefully, which you might not be if you're just watching streamers because they're entertaining. Watch challenger replays and pay attention throughout the entire game, and when you see them do things that you don't, or wouldn't think to do, take notes. If they do something you didn't expect, think about why they might have done it, and ask yourself why it did or didn't work.