Well there is some truth to this. Considering at WoW's peak roughly half it's subscriber base was in China. That can be confirmed if we look deep enough. They paid something like $5 a month or less per sub due to the way the market works over there. So when they had big subscription losses in the APAC region it didn't hurt the monthly income as much as say losing 5 million subs in the US.
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No one has ever said Wow is perfect including Blizzard themselves. But a game doesn't need to be perfect to be fun. I can think of dozens of amazing games that were broken as hell and would be considered garbage based on the standard applied to WoW. At the same time WoW doesn't need to be your single form of entertainment 24/7. People with that expectation will only be disappointed. Diversify yourself with other games.