First question you should answer for yourself and think about before being so loud here, please: When did the first UHD rips become avaliable (also for devs to adjust to the requirements of them)? And when did they become more available than just a few ones?
That didn’t happen when the box was introduced and has only happened over the last months… So, be patient when it comes to that matter, please. 
The statement is, as you see above from others: The network port of the Vero is not a general problem! It’s working for many without problems (there’re probably more with no issues who don’t write on the forum than those having issues and bringing them up here). So, having said that, every setup and network environment is unique to a certain level and therefore there can be issues hard to find or solve, but it’s definitely not a general issue with the Vero 4k’s network port OR the Vero 4k in general.
We can understand your frustration, but please be patient and trust the devs to fix issues and also trust others, who are on this forum, helping others, without compensation during their free time, to help you find a way to work around your problems… 