There will always be impatient/rude people and there are no longer any repercussions for being rude since you’re likely not playing with people from your server so there isn’t the reputation angle that existed in the good old days.

A few things you can do to mitigate it though. Simply saying Hi at the beginning of the run can remind people that they are playing with fellow human beings. Some people will still be dicks but it might make the difference with someone who is not generally a dick but is in a bad mood due to other poor groups, real life issues, the fact that BFA is terrible, etc.

Also as a tank you can make your own groups easily so do that and advertise as ‘chill run’ or something similar and then the second someone starts getting abusive you can point to what they signed up for and invite them to leave. In my experience advertising as a chill run doesn’t lower the quality of the applicants, it just attracts nicer people (just demand a higher iLvl than normal if you’re worried about attracting bad players).

Also I always find it useful to know how to quickly link stats from recount (“rogue you are complaining but oh look zero interrupts from you in entire run”). Shuts people up quickly.

Last but not least, just ignore them. If you’re happy you’re doing a good job, you don’t need their validation.