And there are a lot of designers who are good, but only in a different medium. Being able to make a good flyer, a good trade fair booth and a good website are completely different skills, but all too often the same designer is expected to do all of those, and more

I admit that those type of politics depend on workplace culture and I worked at two highly creative-oriented companies previously, and in both companies any attempt to point out issues in the design resulted in a "this is according to design spec; not fixing."

Totally fair.

Not a designer but the worst feedback you can get from your coworkers is nothing.