My team just intentionally lost me the game.

I was playing a game of Yi, besides the general bullshit bronze players do such as asking yi for ganks while he's on the opposite side of the map, pinging me to go away when we have a free turret, not collapsing on the enemy resulting me in getting killed and the enemy running away with 1 hp.

At a certain point they just stopped autoing minions, A LEGIT 25 MINUTES where 4 people didn't autoed minions ONCE, yet they spammed def pings on the turrets despite having just passed by a 4-sized wave.

The game ended because after trying to chase kills from blue buff zone to red buff zone, and feeding several kills in the process they just walked into 4 of them (oh, i stomped their nasus so hard i managed to make him ragequit, so the game was us with a full outscaling team, me fed like BALLS since i was full build and with 5000 gold in the pocket in a 5v4 scenario) and the enemy team just ran down mid as i was autoing the enemy nexus turrets after taking 3 inhibitors all by myself without having my teammates just auto them once, the nexus turrets were 40% hp with me and super minions autoing them.

This is legit intentionally lose the game, i've had many similar experiences (basically every game i lost since 2 years now, otherwise it's me carrying 1v9 the game) but this example is so clear and blatant that is textbook tier.

I want riot to give me an explanation on how this bullshit it's tolerable but me asking to build a sightstone or calling people "bronzies" when they are loudly making an ass out of themselves is considered "toxic".

Additional infos: they were a 2+2 premade, most likely a 4 man premade, one of the biggest cancers of this game right after recalling in front of a free objective and sightstoneless supports.