I take it that it wasn't a twelve step group. I"ve been to meetings of various kinds since age thirty and that hasn't happened, but it is always a risk to voice how you feel. If you are in a group of people who have never experienced what you have, it can sound insensitive. Some people who are mentally ill (in fact most) are not criminals, do not steal from us, and don't break the law.
Also, there are some people who truly believe it is their duty to take care of a mentally ill child forever, until they die. They are eighty and taking care of a sixty year old "child" and have never lived a life at all. That is a decision any of us can make.They forget that there are outside helpers and that they can't live forever and that they are not prepping their adult child for the day when he will be alone. Then what???
Obviously, this group isn't for you. Not all groups are a fit for everybody. I've quit some groups, especially when I felt no connection with t he others in it. I have been in groups for people with Depressive Disorder that made me feel that the majority of people in it weren't trying very hard to get better, so I didn't feel they could help me move forward. I have found groups for Depression where almost everyone is committed to getting well. That was always a good fit for me as so was I.
Don't feel bad about this group. Move on to a different one (maybe Twelve Step) or find a private therapist if you don't like groups. I like Twelve Step because they don't interrupt you and there is commenting but there isn't supposed to be judging. It is more instructive than crosstalk. After the meeting people do make friends and talk, but nobody interrupts or criticizes another during the meetings. At least, in a good group they shouldn't. I feel safe there because I know that they feel the same way I do.
Anyhow, I wouldn't go back to that group. No group should call you names or make you feel bad. Was there a facilitator or was it self-help?