Option to avoid certain players? Player blacklist

I’d like to have the option in the game to avoid being paired with certain players. Today I played with several spear-elf players who whined about my low hero level, then ran ahead alone, got themselves killed and abandoned the game as hosts.

An option to avoid such toxic players via a custom list would be ideal. Then you won’t get match with people you don’t want to play with.

There is a discussion on this here too.