Is it just me, or has the community gotten a helluva lot worse recently?

I just got done with a streak of matches with a bunch of really awesome players who played well and were really polite and shit. Now it feels like those players went on permanent vacation, because the only matches I've been stuck with are full of a bunch of ragers, feeders, and AFKers. It's starting to reflect negatively on my attitude too, because the constant toxicity literally poisons the well, and makes you toxic. Is there any advice that I can use to better deal with toxic players so I don't end up raging at a toxic teammate, or get so frustrated I end up just giving up?

I play though 98% of all of my matches unless there's connection issues or an emergency, but recently I've been exiting out just because my team is being so toxic and frustrating I literally can't be in the match without the urge to be incredibly spiteful and build mass tear and feed. I'm trying to keep myself from becoming one of "those players" but it's just gotten so bad recently without the tribunal and with the fact that a certain player's name has been dropped that does nothing but feed daily in his games, and still hasn't gotten banned yet. It infuriates me because I want to have fun and play nice with a bunch of cool guys and girls, but I am not having fun. Every game I've played this past week has just been frustrating or apathetic at best, and downright breaking shit in my room at worst.

Edit: I would like to avoid breaking out the all-mute at the beginning of the game, because I feel that communication is necessary for good teamplay. Until Riot implements a system like Smite where you can hotkey all necessary responses, that's the way it's going to have to go for me.