In my own experience going through renos and picking my own fixtures. It's all expensive and larger brand name items have been pretty good.
This is my bathroom faucet, chose it based strictly on design. It's originally matte black, but the base has shiny black parts. It wasn't like that when I bought it, but after about 2 years of use, it looks like that. I also have an issue with the ball valve. I lift up the lever to turn on the water and swing it left and right for hot/cold, well when i lift it up, it falls downs a little. That happened over time. I have double sinks, so after it started to fall down, i used started to use the second sink. The second sink still stays up strong so perhaps it was just the 1 faucet? I think it's the house brand or something, but I bought it from GR Marine at Big Bend.
This is my hand towel rack from Amazon. The matte black finish is peeling off.
My Delta kitchen faucet still has a uniform matte black finish, nothing like the issues you see above. Also Delta was really good with replacing a missing mixing valve for one of my shower fixtures. They sent it to me for free. Just a phone call to do it, didn't need to show any proof of purchase.
To take it one step further, my matte black handles for cabinets. They're richelieu and the finish is scratched off pretty easily. I haven't scratched off large chunks, but the lines so far look like stainless steel underneath the matte black finish