I can understand your feelings. You may find that what you are able to get out of the group experience is greater than the conflict that you feel. Or, it may be the other way around. If it doesn't work out for you you can quit. If you don't go, you may miss out on a potentially helpful healing tool.

I have been in a group t situation that was co-led by my individual t and another t at her centre. I hadn't been in t with her long at that stage and it helped me develop a stronger trust in her, because I was able to see that she was the same, or continuous (or something like that, which was important for me at the time). I also developed close friendships with two of the other group members, who were both clients of my t. Those friendships turned out to be critical for me for the next ten years.
But there were things I didn't like about the group. One woman seemed to dominate every session, and there was another woman in it who just plain scared me. But, I stuck with it for the full length of the course as the benefits outweighed the negatives for me.
Ultimately I guess the only way you can test if it will be that way for you is by giving it a go.