it's easy to talk about such things in therapy, but a good therapist isn't going to bias-confirm you, or engage you in escalation/exaggeration. online communities do that, inevitably.

your therapist also isn't going to flip out at you and call you a ungrateful piece of shit when you complain about your parents. people online and irl will definitely do that.

there is a cultural default where you are not supposed to be critical or resentful towards your parents for sure, which I think forces almost all of us to internalize this stuff. personally i've never had a partner who i could talk to about my parental issues without serious blowback and judgement for what a shitty person i was for daring to say such things about my folks... but my siblings? yeah they are more than happy to be critical about my parents esp def to how difficult they were about elder care, which made us all angry and frustrated with them. and i had to keep point out to my siblings... my parents were like this their entire lives... they weren't magically like more difficult as they got older, they had always been inflexible, stubborn, and refused to be proactive... so we basically had to do all that for them as they aged.