Highland Ridge Open Range RV 275RLS

Unfortunately, reviews are often skewed. Also most RVs probably have poor reviews. 
If looking at lower end models, some of the important equipment can be more lacking, like marginal axle size for weight etc. 

Same goes for build quality, but that doesn’t prevent a higher end models having issues. 
Personally, after having a couple quality truck campers, a mid range toy hauler and renting a few random TTs, you kinda get what you pay for. But none are immune to issues. 
And while if no one bought new RVs, there would be no used ones for sale, used has a couple advantages. 
aside from the obvious being cost, a great deal of issues are when the rv is new, it seems. Working out the bugs or whatever you want to call it. 
Buy a clean one well kept that is relatively new and been used enough to put everything through its paces for a while, is a great option and the $ saved can pay for some repairs as a paying customer rather than getting stonewalled with warranty claims. 
And if you don’t have issues, even better. 
JMO.