Here are some common level criticisms that I personally hate.
1. It’s too big.
Guess what? It’s not always too big. I get this a lot when in fact it is NOT too “big” (whatever your definition of big is). Sometimes it might actually be too big. Then again you have to define “it” and also define “big” to make any sort of sense. Because you don’t make sense if you just shoot the comment out there. You also look stupid.
2. It’s too much like X
If it’s a mapping project that’s fairly involved, the author probably knows.
3. It’s a port
So? Valve ports maps too.
4. Since it’s a port, it’s not suited towards TF2.
Valve ports maps. The maps they port GET suited for TF2. Anyone blindly porting is destined to fail anyway.
5. I get bad FPS
This depends on whose map you’re playing. If you’re playing one of my maps, you need a new computer. I don’t make anything that runs worse than Valve maps. If you actually do get bad FPS, say where. It might actually prove to be slightly useful feedback.