SINGLE WORST EXPERIENCE IVE EVER HAD IN THIS ENTIRE GAME

This is going to be a bit of a rant, but I sincerely think something needs to be done to prevent situations like this. I was just in a blind pick game, and minding my own business I called jungle and locked in my champ no harm done no one else even wanted it. Well of the 4 other people 3 were a trio, and 4th a random, well the non trio person called support b4 anyone and locks in zilean, so far you'd think no issue, well the entire trio flames him and is completely childish insulting him name calling, so I said look he called it, it's one game so what, so then they turn on me. One of the trio, literally with the name [removed] says right form champ lobby he's going to intent feed. We get into game he isnt even trying to lane, hes against a talon top and ends up going something like 1-11 or so, and the 1 kill is from talon diving him under tower. Now this game was compeltely miserable, the adc one of the members of this trio D/C'd for over 5 minutes game back at level 1 while enemy bot lane was 7 or so and proceeded to feed them all game long, I continually was talking in all chat all game long telling the other team what was going on, and I was just told to Stfu no one cares etc, all while this trio on my team times smiley faces, and says thanks guys to the other team all while the other team says theyre going to honor our 1-11 swain for giving them an S+ rank. I'm trying to forfeit and so is the other random in with me, but we cant do a damn thing, were stuck with FF being blocked by one of the most immature toxic trios ive ever encountered, and the enemy team was winning so dominantly they didnt even care to end, the trio I was trapped with even told them in all chat, Take your time please we'd like this drug out, so I'm stuck, in a losing unwinnable game with toxic jerk offs blocking forfeit, but if I leave game Im the one who gets penalized, someone somewhere tell me how that's fair or what on earth you can do in a situation like that? I was so frustrated and just dumbfounded how such a crappy situation could be allowed, and yet they wont get banned they wont even get a slap on the wrist, they all honored each other, and even asked enemy team to report me for flaming them and saying i was giving up and afk ( none of which was true) but they have numbers on their side. It's like this game isn't meant to be played solo, and the community has the miserable reputation that it does for a reason. People exactly like that trio are why this game and the community get a reputation for being so toxic and yet they just get to go on with virtually no checks whatsoever, it's so beyond frustrating and I guess the point of this post is to vent but also call out RIOT to do something. Lastly, if you ever get into a game with a group club tag [removed] and the club is [removed], goodluck you pry aren't gonna have a very good time.