This is not even close to true.
The Romanian is a far better rifle.
Better, perhaps. Far better, probably not.
The Yugo is more overbuilt. I can't speak for the Romanian, but the Yugo is completely milled as opposed to rifles of some other origins that have more stamped parts, esp among the trigger group. The Yugo is heavier and more over built because Yugoslavian ammo was loaded hotter.
I have had a late-model Russian before, and the Yugo is just as accurate. None of the Chinese rifles I've had a chance to shoot have compared.
Comparing my current Yugo to my Russian (unfortunately sold to pay utilities when I was in college), the Yugo is heavier, but just as accurate and reliable. And because corrosive ammo for the 7.62x39 is virtually non-existent, I don't consider the lack of chrome lining a big deal.
My Yugo has been my truck rifle in the past. It has bounced around behind the seat of an old 76 Ford F150, dealt with the condensation, and showed no signs of corrosion, despite experiencing rare maintenance.
I'll admit my experience with Romanian weapons is limited to my Romanian WASR. That rifle has always been reliable, but it is a bottom of the barrel rifle compared to AKs of other origins and I assumed, perhaps incorrectly, that the Romanian SKS would be of similar overall quality. But to say that the Romanian SKS is far superior to the Yugo, I think is an exaggeration.
I consider the Yugo SKS to be the poor man's M1A. It is more accurate than it has to be, absolutely reliable, and end of the world durable.
And lets face it, plenty of older military rifles experienced plenty of moisture with little maintenance in times of war before chrome lining became common and did fine. It used to bother me, but having put my Yugo through its paces, I have no reason to believe it is even an issue for most normal use. And in fact, as non-chrome lined barrels as a general rule tend to be more accurate than chrome lined barrels, I believe lack of chrome lining is one reason why the Yugos may be so accurate.