I find this quite insulting to be honest. Like not knowing anything about doctors and then saying they are evidently not concerned with human lives because every now and then people in their care still die. Do some research, it's not that hard. The balance/community team are indeed not professionals but volunteer community members who work hard in their free time to try to make the game better and add new content where ever possible. Polish is most definitely a concern. What you're failing to see here is that (partly due to Relic's spaghetti code) with every patch having dozens or hundreds of changes, there are also hundreds of bugs and other issues, of which 99% get traced down and fixed before it goes live. Inevitably a handful remain, it's a huge game, and there is no professional test or dev team to find and fix everything. Instead of just complaining about them, I suggest you report them so the team can become aware of them and try to fix them.
To be fair, current CoH2 is less polished than the average steam workshop mod.