Digesting and doing what is in An Attitude for Acting: How to Survive (and Thrive) as an Actor might help: https://www.amazon.co.uk/Attitude-Acting-Survive-Thrive-Actor-ebook/dp/B01EZCDXA2
It is written for UK actors by a respected drama school tutor and a neuroscientist and is suggested reading for third years at my school. Some of the Americans here that haven't fallen too far down the bitter actor rabbit hole might benefit from it as well.