By the common fan, probably not so much.
But from a narrative perspective, he's the worst. In wrestling, there's a concept called the "rub". It basically means you're giving your opponent legitimacy by having them win/do well. When building a "monster", a group of wrestlers, in series, give a quick "rub" by getting beaten badly, inside the narrative, by a superior monster.
Then along comes Rey, beats the monster and steals all the accumulation of "rub"...Often ruining the monster/performers future narratives forever.
So what's the problem?
Rey can't transfer "rub" back up the food chain. When someone beats Rey, it's expected because he's the tiny little luchadore. Nobody gets a RUB from beating Rey.
Unfortunately, that's due to the success of the WWE and the value of the performers.
You can't let the boys just go out and tear the house down every match because it has major financial repercussions when they get injured. So they work a stripped down, safe as they can style for weekly TV.