Laggy matches because of 1 person

I’m consistently 10-20 ping every match. So my internet is not the issue. I’m not gonna go on a rant about it, but I seriously wanna know why the match gets incredibly laggy just because there is 1 person on my team who is at 90-130 ping. It’s obviously worse the more ppl there are with high pings but 1 person??? I just dont understand. 9 of 10 games I play have this issue. It’s getting old.