Why I have to deal with this

So I just played a game. This game we won early game heavily, specifically our bot lane whom was an Ashe and Brand. Now into middle game i was jungling doing my camps when ashe (whom had ran it down bot) comes in and pings me for taking camps, sorry bud that i got there first before you even asked. Not only that but she then runs it down. And whenever we do a objective she either goes back to base or split pushes. We asked her to stop and to help but she still did it. After a while, our best damage dealer to the objectives, (ashe) just stopped helping us in general and she cost us the game She would facecheck bushes even though we warn She split pushes most of the game, as an ADC without any help. DIed every time And she wouldn't respond to anything. She might of muted us but we hadn't said or done anything to her before. Such fucking bullshit and a waste of LP that we deserved.