Why do i have to deal with trolls. Why riot?

Why do I get an annie top. yi mid. and darius support. feed and we lose. and then don't surrender and tell me they are doing this so i suffer? Why riot. why don't you do anything about this. am in a game right now. and this is happening. wht do I do. the enemy team is trolling to and they won't end. WHAT DO I DO? WHAT?