As far as breaks go, I pretty much took a 2 month break, and it's been very rejuvenating for me, I'm looking forward to getting back to league, so maybe you just need a bit of a longer break?
As far as the state of the game itself, I feel like a lot of the players are just as toxic as before and the problem only continues to get worse. IMHO, riot doesn't give a shit about the toxic community, if they did, they would implement extremely more severe penalties for a great deal of things.
One of my biggest griefs about ranked, which goes back to what you guys were talking about, you automatically get punished completely if you lose, regardless of how well you did, and you automatically get rewarded, even if you did awful. It's pretty silly how bad that system is, especially with people exploiting the game through boosting.