What is the counter play when encountering Moonknight?

For example the symbiote map he can literally sit in the back and spam Down the hallway, then if you dive him he runs back to his team and it’s seems I’m the only on the team that understands how he can literally turn a game around for the other team. It’s a a real problem right now. Everytime the team is losing they switch to moonknight, he’s such a crutch right now. Maps with hallways he’s so oppressive, which is most maps. I’m on my way back to diamond and it just doesn’t make sense why the team doesn’t dive him but he plays so far back that you’d have to get through his team to dive him it’s so annoying.