So much BM even in unranked

Anybody else experience this as much as I do? It's getting super annoying because it happens often where I'll match with someone who's clearly better than I am, lose a game and get lol spammed and they either quit out or swap characters and proceed to spam more if they win. Hardly ever get a 2/3 from these people.. Just had this shit happen recently and they immediately quit out when I win after the 4th game. I know I should just ignore it and go next but it's becoming more common and ruining my experience.