[RC_ITR]

Unless you stop making comments like that, I will never upvote a comment you write ever again.

^that is certainly more 'toxic' than:

I disagree with your point. I think disagreements and negotiation with an employer are fine (to your point, one can even use the threat of quitting as part of said negotiation), but ultimatums just serve as an opportunity for the giver to imply that they have more power than the receiver, which is 'toxic' behavior