While I am a nostalgia person, I have no problems with most Hoenn Pokemon. Feebas can go die in a fiery pit, but apart from that, I can't think of anything.
While Hoenn contains Pokemon like Wurmple or Plusle that seem to be somewhat inspired by older ones, it also has a lot of good Pokemon.
Most starters are very good ones (I find sceptile rather ugly, but I'm cool with the rest), Zigzagoon is one of my favorite derps, Nuzleaf is among the best things that ever happened to Pokemon, and Pokemon like Numel or Flygon are clearly among the better ones overall.
No, I wouldn't call Hoenn bad. If we're talking about Sinnoh however...