Is it true that "Juren doesn't perform as well in high level play"?

I remember hearing this on the previous Warriors Den stream, but I honestly struggle to believe it.

I still constantly see complaints about Juren from every skill level, especially from high skill/pro players.

I can understand Juren not being the best performing hero at high level (because Pirate exists). But not performing well enough to the point that they won't nerf him? It just doesn't make sense to me.