OP, I am sorry you have had so many harsh replies, when it is clear you are hurting. It's true you could be an abuser, but there is no evidence of that in your posts, and as we only have any OP's word for what they say, we have to take it at face value - we can't make up random back stories for every post we read, or the whole thing becomes pointless.
It isn't, however, true that all people do this to their parents. My childhood wasn't picture perfect (certainly no Disney World trips!) but I feel I am a decent daughter - I moved back to my parents' area when dad become ill with dementia, which was a bug unheval and required a change of jobs etc. I see them regularly, am in very regular touch with my mom, and am hands on in my care for dad when needed. My brother lives further away but is still in touch regularly, supportive and often visits. I have my mind made up that I will live with my mother if she needs care in the future, even though it's far from my ideal scenario, because I would never abandon her.
Of my three very close female friends, one lives with her parents and the other two see theirs regularly. One holidays with hers.
Some people are just not very loyal I guess, be they parents or children. But there's no reason to extrapolate that that always happens, it doesn't, thank God.
I am sorry it happened to you though, OP.