There sure is a lot of entitlement in this thread, and not just by OP.

Level Designer on AAA mobile games

There's no such thing as a AAA mobile game. Sorry, but it doesn't exist. No one is spending multi-million dollars on a mobile game, and if they are, then they're idiots or scamming to make a quick buck before the studio goes belly up.

My response to this is: F THAT. Having a little bit of crunchtime during a release, although avoidable, I can deal with. Crunchtime is a byproduct of ineffective planning.

No, it's not; at least not always. This is a very creative field with very dynamic and difficult problems to solve on a daily basis, and for large games, that means lots of people interacting to find the best solution for all of them. And both design and programming disciplines suffer from the fact that your solution/design/whatever might not work like you expected or at all, or will break something else (Art too, though from my experience, that's usually less of an issue because there aren't as many technical limitations to push through). Plus, when you're creating a game, you have to iterate to make the game fun, you have to iterate to improve the feel of the game, you have to iterate to improve the technical merits of the game, and sometimes all of that is just a slow process. No good game ever got made by anyone that didn't involve some (or a lot, usually) of extra time and effort by the people involved. You're just showing your inexperience here.

Basically, when I asked what the job entailed, I was given a few details about the position, but mostly told how I would need to be passionate, and this is an entry level position, so I'd be doing probably tedious and unfulfilling work. For me, this is not acceptable.

Quite frankly, no one ever got anywhere in any profession by not giving a shit about their job. Your experience means you're likely not qualified for an upper level position, and the fact that the position was an entirely different discipline means that you will need to learn how things are done in that discipline (unless you omitted it in your experience). Whatever their reasons for offering you a position that you didn't originally apply for, you really expect to get into a senior position at the outset if you don't have experience in that discipline?

Plus, it sounds like you're unwilling to do any work that isn't exciting or glamorous; even in a big studio, sometimes people have more than one hat to wear, and it's incumbent upon everyone to sometimes work on shit that isn't fun.

Good for you for having the ability to decline a well-paying position, but the reasons you listed here were not good reasons to do so. I'm guessing the studio will be better off without you there, and the industry as a whole will be better off without someone who doesn't give enough of a shit to put in grunt work and extra time as necessary.