I haven’t heard of too many happy with Adventure this summer. I think it’s a combination of summer sailing (huge crowds), older ship, maybe less experienced crew and maybe a crappy F&B officer.
I’ve sailed a few mainstream companies and found that they are all more similar than they are different. The differences in my opinion are in the specific ships. I now only book newer ships that get overall good reviews. And I never sail in the summer and after a Christmas cruise never on a holiday either.
I’m sorry you weren’t happy with your cruise. Hopefully the next one will be better.