Most mechanics I know would grumble a bit after the third time. It's a bear of a job, and they'd make more profit doing twenty oil changes in the same amount of time.

The DBA's job doesn't generally extend to fixing your code to use database features correctly, write SQL in a sane way, etc. Even if it does at your company, unlike the mechanic they're not being paid by you to do that work; they get their salary regardless. So it's natural that if you keep bringing unpleasant work to them because you're bad at your own job, they're going to get upset.