Druid as a class in and of itself is highly disappointing, though. You're basically an accessory to your pet, not the other way around.
.... wat
If you disagree, post a good Druid build, where 90% of all the damage isn't done by the animal companion. And I don't mean just the end-game.
Well your erroneous assumption there is perhaps that a character has to do physical damage in order to be effective?
Druids have a brilliant spell list including some unique spells and some arcane spells that Clerics don't get.
Creeping Doom, Sirocco, all the summoning spells which are better than the ones everyone else gets...
If we're purely talking physical damage then of course they do much less than the companion, but you never specified that in your original comment.
Wild Shape is more or less a role-playing / exploration tool originally which is why it's underwhelming, mostly, in KM.
If the Animal domain didn't exist they'd be a top tier class, because so many other classes can get pets when they shouldn't really be able to do by grabbing that domain that makes Druids a little weaker, but they're still a good class.