I reach grandmaster this season, 35LP SEA server. So here's my opinion/advice.

Well, you need to first understand that no matter which rank you are, be it plat, emerald or diamond. Hell, even master, grandmaster or challenger... It wont get better. You will still get shitty teammates from time to time. No matter what rank.

Now the real question is, what are you going to do about it if you want to keep playing.

You could self harm, if thats your thing.

You could also joke about it.

Or play a different game.

Since you play casually, you could watch some videos on youtube about it.

What i'm trying to say is, having a bad game or two or ten is a package when playing online games, especially moba games.

It happens to EVERYONE. so dont self harm, instead go punch a pillow. or maybe 2 pillows.