I'm sorry. That's not what I meant. We added a special skin as a reward for "beating" the Dungeons event (you can't beat Dungeons, but we wanted to give players a milestone that feels as a big achievement). And we're for the most part confident that getting to floor 30 should not be an easy task, but should also be doable. Data from previous Dungeons showed us that was a good place to place it. Of course, for some Captains is too early in their run, and for some is too late. We will never ever be able to satisfy everyone and we will keep looking at data and taking everyone's feedback into consideration in order to make the game as fun as possible for the Captains and players that enjoy this game mode. We may lower the required floors in the future, the same way we might place the rewards higher if we feel it's easy to get.
But the whole idea behind Dungeons is to actually make the game harder. More challenging. So in this cases we lean more towards the hard difficulty than the easy one.
I'm sorry you are not having fun because of this, but I assure you we do read everyone's feedback and have constant internal discussions about the game with the other Devs. Sadly, there's a lot to be done and we want to make everyone happy. Wich is impossible. But, if more people starts complaining about this specific issue, we will for sure adjust the difficulty so more people can get the achievements. This system is still kinda new and so far we haven't received much feedback besides of what we can extrapolate from game data.
I hope this helps change your mind about our intentions. But I also understand you might not be satisfied with this answer. You're welcome to reach out to me here or by dm if there's something else you want to discuss or more feedback you want to provide us.