What’s up with players trying to bully you into giving up the hero you picked first?

Just had a whole team harass me the whole game because I picked cloak and dagger first and I guess their friend wanted to play cloak…..very weird and annoying. That’s why people need to learn how to play multiple heroes.

If someone picks one of my mains I never fuss or beg…. I just pick someone else. Why are people so entitled on here? (Sometimes I will be nice and let them have who they want but it’s not an every time thing. But people just expecting they can tell me what to do and who to not play as is crazy)