I did tech support and I definitely liked it. Climbed up the ranks quickly. Really the first job I was exceptionally good at. The problem was that not only the calls kept coming from fresh users that were just as uninformed as the ones I got on my first day but worse was the fact that every month my coworkers got more clueless than the previous batch.

I can stand clueless (and largely thankful) end customers. What I cannot stand is people that should be better at what they're doing and simply don't care.