To build up on it: think long term as well.

Nowadays, it’s a 20% pay reduction. How does it look for long term? Will you have growth options in the new position? Will it sabotage your resume? Will you be able to keep adding to your 401k? How likely it is that a rotten apple coming would spoil the mood in the new job?

And: are you really really absolutely sure that the new job would be more chill for you? Think about yourself and think about how you would feel in that job after 6 months to a year. Would you still appreciate it? Would you get resentful because you have little to do while you could do so much more? What would be your frame of mind after a while?