Intentionally screwing over teamates?
Recently had an aram where an Anivia was doing OK kda wise, attacking enemies, running from danger, using ult, stunning enemies, ect.... but every time they used their wall it was like they were intentionally trying to get our teamates killed. Like, literally every single time they walled either nearly got them killed or did get them along with others of us killed too. It wasn't even that they walled to stop an enemy chase, but they'd wall at just the right place to cut off any escape for us, anivia's allies. We couldn't really go in for an all out fight cause we knew if we did, if the fight went bad and we tried to leave, a wall would screw us over.
Examples: Ryze went in for a stun, went to walk back to us, Anivia walled and turns what what would have been an easy in and out into a near death for Ryze. The Xayah went in for a kill, went to leave, a wall prevented their escape and got them killed. Xayah and I (illaoi) went in for two kills, suddenly a wall behind us to stop us from getting away from the enemy team. We lived, but lost significantly more health because of it. Riven went in for a kill, didn't get it and went to back out, a wall popped up and stopped them from escaping, getting her killed. Many more events like those happened over the course of the game. Needless to say, we lost.
But the reason it was so confusing was because aside from the walls, they were an ok player, not good, not terrible. I'm not sure if they were trolling, really hated us for some reason, was a very good/bad bot, or what it was. But because it was pretty much every single wall, there's no way it wasn't intentional. But... how would you report something like this? Would you even report it? They themselves were not intentionally feeding, it's just like they were constantly trying to get the rest of us killed.