Do it for yourself, not because you owe anyone anything
And "tolerate" doesn't mean accept mistreatment, marginalization, disrespect, dishonor, abuse, or anything thereabouts
Other people carry loads of baggage and insecurity and hurt and complexity that is sometimes going to flare out at you in ways that are really truly unfair. You absolutely didn't deserve that crap.
For me this is a revelation: disconnecting other people's lousy beahvior from me, realizing that it is about them, not about me. I don't have to be in relationship with them if it is going to keep hurting me. I don't have to own their unresolved issues. And at the same time I don't have to live a smaller, diminished life because of it.