Yes I have played LoL, not as much say Freakinchair but a decent amount. (Mind you this was atleast 1,5 year ago, but I doubt much has changed) and tbh I've seen people spam that surrender button when things go south (even within 10 minutes), ofcourse you need multiple people to surrender but it does encourage the defeatist attitude.
I don't need that shit in dota.
you know what promotes a defeatist attitude?
people leaving!
yo, hes played 1000 games of league and 1200 hours of dota
are you doubting him