Games not rewarding enough
For me, the game being fun doesn't really occur often. I could go months without finding league fun at all to downright hating it but only playing it because my friends don't have money for other games. Recently I had some fun playing league, during the IP boost thing, I felt that even if I lost I would still get something out of it other than hating myself and/or the game. The IP boost made the trolls, feeders, dumbasses, and flamers a little bit better to ignore because regardless or winning or losing, I could play the game and get closer to getting a new champion and closer to playing league in a new light trying out that champion. During the IP boost I was able to pick up Bard and Ekko, I've had fun playing both and probably will for a little while but the time of me playing them until I get bored and playing them until I can afford a new champ is completely different. I can play a champ probably 20 games before I get bored but even that's stretching it.
I feel like we should be earning more IP per games. I'm not saying 450% more although that would be nice, but something like at LEAST 100 IP per game would be better then losing a game and getting 57 IP and feeling like you just spent 30 minutes getting flamed for nothing and feeling like you have to grind a diamond into a very fine dust just to get a 3150 champ.