^
This.
All of it, and so much more.
What I don't think Riot completely understands is that there is more to a quality experience than simply "Do I have an even chance of getting that victory screen". It's all the intangible things that their toxicity algorithms or whatever the fuck they use to measure shit games with is incapable of picking up on. A trio can never say a single word in chat and by their actions alone be the most toxic fucking players you have ever met and it's simply because they're not paying attention TO THE GAME, they're paying attention only TO EACH OTHER.
But then add to that the problem of 4 man or greater squads having a massive strategic advantage over you and the whole thing is just fucking infuriating. Plus, the match making system has this uncanny way of pairing you with groups in streaks of games, so that you just get more and more and more pissed off, but then it'll ease off for a while and you'll fool yourself into thinking it got better just up until you have that promo series and then BAM! Shitty Shitty Shitty 3 mans 2 games in a row again. Usually the same one.
Fuck
Dynamic
Queue.
Look Riot, we hear what you want to do with this system.
We hear that you want to allow people to play with dynamic groups of friends, we do, we get it.
What we the solo Q players are telling YOU how ever is that WE DON'T WANT TO DO THAT! GET THAT FUCKING USELESS CASUAL FUCKING SHIT OUT OF THIS GAME AND CONDEMN IT TO HOTS WHERE IT FUCKING BELONGS! Either that or MAKE IT A COMPLETELY SEPARATE THING. You know, LIKE NORMALS USED TO BE!
and 
) , the 3 man premade refused to surrender. Hell, there was no coordination to speak of. When we scored an ace, I immediately pinged for help in taking Elder Dragon. Did the 3 man premade come to help? No. It wasn't until 5 minutes later that for some reason the premade unanimously voted on surrendering, despite having refused previous numerous attempts, as if they were done stalling out the game and wanted to quit out of boredom.