My parent is a bad person [rant]

Not the worst. Not outright criminal, maybe small time stuff. But I mean in terms of moral ethics, is a bad person who's hurt people in the past. And hurts people right now. There might be extenuating circumstances why they grew up like this, but nevertheless the person is a bad person who hurts people. They are a decent parent who I believe do really love me and my sibling, but not selflessly and they don't trust us siblings and is suspicious of us because they project that we must also be terrible people after their money.

I am certain that they grossly misrepresented their age when they met my other parent. I am certain that they had been unfaithful. There are many lies and I do not feel like us siblings or anyone have ever successfully been able to engage with them honestly. They have many facades. My other parent was an honest and good person who deserved much better than how they were treated.

Advice not unwanted, but I'm not really sure what I expect, just airing out a sentiment I do not feel okay to express to any of my friends, and I am trying not to wear out my partner from having to hear it over and over as well. Yes I have an appointment to talk to a therapist