It can be very frustrating when you are a highly experienced player arguing with what would be considered a newbie.
Dunning-kruger effect in League of Legends
As an ex-Diamond 2 League of Legends player in my region, I could proudly tell others how I was part of the top 2% skilled players. Not always would I play ranked games, though. And at times, newbies would play with me.
Arguments about what a newbie player could have done better in a certain play can get extremely frustrating. They would say "I did the best I could". They would be stubborn about it as I, as the greatly experienced player, would tell them there were better options.
The dunning-kruger effect explains why a less experienced player will often have complete faith in the fact they took the best possible course of action in whatever situation they were in. Nasty fights would often come out of this.
In contrast, it also explains why I tell people "we are all learning nothing but the basics while we climb up to Diamond 1". That's truly how I feel now that I've nearly been to that level.
We can find so many psychological theories and effects on display while playing multiplayer games! It is really interesting how human behaviour stands out in this situations, in case we are into that sort of thing.