I think sometimes we have a hard time talking honestly about the difficult stuff in our interpersonal relationships because it feels like if you have something "bad" to say about someone, if you have a problem with their behavior, it must mean "chuck them in the bin."
And so it feels like, if you DON'T want to throw a relationship away, that you aren't allowed to have a problem with that person. You must silently accommodate & tolerate forever.
Those are not the only possible outcomes.