Hall of Fame
I can see a 13y/o boy at our club with UTR 7 struggle on shots against a good slicer-dicer off-pace baller. But you have to look at it from a full match stand-point. While our junior may struggle on some points and even a few games. There are many other points where his speed and agility can keep the rally going and the adult will make the mistake. And let's not discount the fact that junior can hit some pressure shots that leave sitters for clean put-aways; or floater returns that he'd step up and volley or OH.I say any kid past age 12 with a 8 plus utr. Can deal with junk. That's a decent amount of kids.
It's more a matter of mental maturity. Can he resort to high percentage rally with low UE vs trying to hit winners on everything. He has the tools (slice, lob, loopy topspin). But can he put them to use because everything looks like an easy sitter to put away. For the most part, the latter is what you may be seeing.