This is current NA mentality. It's been like that for a while, if they want to go fast that's how EVERYONE should play. They don't even stop to think if that's how the other 3 humans on their party want to play. It's all ME, ME, ME. And 100% of the time, they have a mentor's crown and possibly all but one or two jobs maxed out. You're new and want to watch a CS? Shame on you for not playing at 3am on patch day, it's old content now.

Some are bearable, but some are toxic like the OP has described. If it's the later I just prioritize tank healing, occasionally targeting a healing spell towards the offending DPS when their HP gets really low. If they die while I'm healing the tank, it's on them. Nothing we can do with the current state of the game, dungeons are not challenging or engaging enough, and the community side of games is dying. People would rather converse with ChatGPT.