Cases of obvious intentional feeding like 6 tears and 3-15 should be escalated to immediate bans
Someone doing this is very aware of what's going on and just intentionally ruining the game - even worse than afk. An afk at least I can understand sometimes because something super important came up, perhaps they dc, etc. but someone who makes it their mission to ruin the game deserves no leeway. It's also easy to see when someone's doing this. I'm not talking about just a bad game where someone builds normally and tries but goes 0 10.
Intentionally feeding is 10x worse than if someone tells me to kms and calls me names. At least I can mute them. I don't even care as long as they do their part since I just assume they're some immature child. Unfortunately, there's no fallback plan vs intentional feeders. Having a thick skin or muting won't suddenly make the game winnable or more enjoyable.