The right state of mentality can be pretty delicate.
A little to the left and you will be labeled as too soft. Always looking to get out of tough situations. Always trying to complain and moan about your situations instead of managing them.
A little to the right and you end up taking everything upon yourself, think that that is what perseverance and mental toughness is. Unfortunately, not realizing that the resentment and the pent-up frustrations are toxically accumulating until someone breakdown someday, suddenly.
Of course, improving our mindset works. But also, we must always be monitoring our own state of mind. Be conscious about it. Always be prepared to step away if you find that things are getting a little too hostile.