That's pretty common... Don't worry about the negative comments, these builders build 1000's of houses a year, and people never complain about great experiences...
You're right, I find a few good tips in the groups, but there are so many "PD destroyed my entire life" posts!
I guess it's not like there would be a lot of people who are happy with their house going on there signing their praise.... they kind of just move on with their life...