Yes if u define beauty as in beauty by appearance, then a lot of hybrids are "uglier" than their parent species.
For example an AT is nicer than an AT hybrid, a powder blue is nicer than a powder blue hybrid, a clarion is nicer than a clarion hybrid, a maculosus is nicer than a maculosus hybrid, a flagfin is nicer than an armitagei, a goldflake is nicer than a goldflake hybrid etc etc.
That said, appearance beauty is v judgemental, so while one feel it is ugly, there'll akways be another who disagrees.