Beginner mistake: a smash has to be powerful with steep angle.
When I play against intermediate level players, when they lose a point to my smash, they go: your smash is bad, it's not steep, I should be able to defend it. But then they keep on losing points to the same "bad" smash and become annoyed.
I think the most common misunderstanding from intermediate level players is that a smash has to always be 100% powered with a steep angle, but there're more than 1 version of "smash", higher level players don't just grind their teeth and go all-in on a smash, they often target difficult-to-defend areas, such as: body, right hip, racket shoulder, etc., these are much harder to defend compared to a straight forward smash.
Have you had the same experience? Keep losing to a "bad" smash? I'm actually very bad at defending smash that goes slightly above my right shoulder (racket shoulder), do you have any advice?