Jax, I know EXACTLY what you mean about the groups!
I went to a slimming world group a couple of years ago and it was horrible. To start with, the consultant was extremely patronising and immediately didn't like me because I wanted to combine SW with "process free" eating . . . meaning I wouldn't be buying all the SW goodies she tried so hard to sell. She also had no empathy or people skills . . . I explained to her in our initial "chat" that I had anxiety and social issues and that I'd rather be "ignored" during the group as I don't like attention on me but still wanted to be there for motivation. She agreed that was fine and in my first meeting she went round with all the usual weight losses etc, skipping past me (thankfully!). Then she gets to the end . . . and goes "Oh, in case you thought I missed out someone, that's Lisa (the whole room turns to stare at me!), she's going to be a silent group member as she doesn't feel comfortable joining in.". I hated that woman.
Not only that but she was the least motivating person ever, she put on weight faster than the rest of us lost it and had more "bad" weeks than the whole group combined!
I'm now doing SW online and it's so much better! And this forum is great for some stress-free support!