Though if you still felt that way past wave 5 or so then wow, I'm impressed.
Well as far as I can tell all you need to do is roundhouse kick them as they run up to you and run away if you miss. Even if you get hit you can just run away and you won't die. The hardest part was probably fighting the camera to get good angles. Here's a vid of what I mean:
https://files.catbox.moe/1cgzga.webm
I guess it would be more difficult if I had set them to attack the orb too though.
Could you quantify what you don't like about the camera? And please don't apologize.
Basically its hard to get it too look where you want it to and it feel inconsistent and changes pitch sometimes by itself for example when you wouldn't expect it to. Like running in a straight line. Your character is most often not in the center and when turning it it just feels awful when it turns around some random pivot point. It lazily pans to the sides while you can barely see whats in front of your character. It all makes it hard to gauge distances with so weird control of the camera, which isn't really a good thing in a fighting game.