I get frustrated and stop playing after a few losses, because I don't really play many games often. Experience and mastery points are severely cut when you lose, but at least with event passes, I feel like I'm still getting a little bit of a compensation after a loss.
The tokens are halved but it's still something I'm glad to get regardless of win or loss, and just make the game feel like it wasn't a waste of 20-30 minutes.
I doubt many other people think this, and I'm pretty sure a lot more just hate the event passes, but I'm just throwing this out there. I'm glad the event passes exist, because they give me an incentive to play the game more and start to enjoy it again. Thanks, Riot.