Yes, Kaohsiung burgers leave a lot to be desired. Can't stand the over-reliance on pork, the dry buns, or the seemingly boiled, mushy consistency of the patties (I believe the pan is never hot enough). Best bet for me has been to go down to Jason's at Kaohsiung Arena, get 2 or 3 of the small ground beef packages they have (you can also go to Carrefour to save some money, but that takes additional time). Go over to the cheese counter for some cheddar, gouda, whatever you're into. Then, walk over to Flavor Field (the bakery) and get some mini Normandy rolls, the closest thing I've been able to find to a hamburger bun in this city. Then you take all that home and make some burgers yourself. It's expensive, but when you gotta have a burger, you should have a burger.
I'm interested to hear your pizza recommendations. Opizza.us is still the best I've found (better than Andy's and the 303, imo).