I would try it one more time and if it still isn't good, I would look for a new support group.

I might even bring up at the group how I felt at the last meeting. Saying something like "Member A and Member B did/said LMNOP and it made me feel XYZ, I don't know if I misuderstood or what, but could I get some feedback from Member A/B about it?"

Or talk to each member that upset me privately to let them know how I felt, etc.

Maybe the people didn't even realize how they came across?

I understand if talking to them or the group about it is too confrontational for you.

Hope support group meetings go better for you in the future!