Well. I've never owned these brands but I think in general that you are more likely to get folks that are unhappy posting their issues. Folks with no issues seldom go out of their way to post.
So. You might take the view that since Forrest River sells many lines and many models in large volumes that there are more opportunities for a given owner to have a issue and then post about it.
I have no statistics to back this up. Just one possibility to consider.
I'll also repeat what many others have said in other threads. Trailers are like little houses. If you have ever build a new house I'm willing to bet you found something, or several something's wrong. Most of the time these issues are delt with to the satisfaction of all. And... Sometimes you get a lemon.
I'm not sure if this helps at all. Just because something is considered by some to be "entry level" or even marketed as such does not automatically mean it will be junk. And on the other hand even if you pay a lot more for a "top of the line" unit there is always the possibility you will have issues anyway.