Hi I'm very sorry you've experienced things like this, let alone experiencing it from your parents at a young age.
I know the invalidation gets you to question yourself but please remember there's a reason you are able to identify those actions as abuse. Its because they ARE abusive.
I'm not qualified or anything but from personal experience Elders tend to deny something as abuse because they are comparing it to something they deem worse. There isn't a hierarchy of abuse when people are doing things that are wrong. That treatment from your parents should have never happened and I am angry on your behalf. I am so relieved that your brother defended you because it helps to have people that make you feel sane in your recollection.
In my opinion, again not an expert, abuse does not have to be continuous. I don't know if this applies to you but from personal experiences abusive relationships tend to go through waves where things can also be alright, seem great and ideal.