I see the problem as, most people on Lemmy are already signed up to an instance that they are happy with. If the instance offers something to really differentiate itself, such as a focus on certain types of communities, or different types of rules or moderation than most other instances, then it might have a chance at catching on. But otherwise, I feel like it would be very hard to promote an instance if its 95% the same as all the other instances.
You’re never going to get all Democrats to be satisfied with any candidate, ever. People are going to complain because they love complaining. That said, I think most people are probably fine with her.