

Got esi u22xt for ~ $100 as a replacement and it's enough for me. I only suggested him a proper audio interface, because I've been in this situation few month ago - tried to use xenyx402 as a mic input.

The symptoms OP described suggest this is nothing more than misuse of equipment, rather than any crosstalk on USB cables or other EM interference. Neutrik are anything other than a cheap brand, and make some of the best and most popular connectors for professional use and carry a premium over cheap Chinese brands. In and of itself, the mixer won't be causing this issue. The preamps aren't as good as some and you lose some functionality but they're perfectly serviceable. And given the low price of some of the behringer models they aren't that bad of a choice, even if you only need a single input. The mixer acts as an audio interface, just not in a way alllowing individual access to the channels afaik. If you have a local music store, go there and try your mic with every audio interface they can suggest you. Unfortunately, it's almost impossible to get cheap audio stuff and get a decent sound quality at the same time One of the best cheap audio terminal brand is "Neutrik". I say that you need to try one, because sometimes this noise comes directly from usb connection, or it can be a result of bad xlr terminal (on this mixer). You may wanna see this video to learn more about audio interfaces in a very simple way.

If you're only using this for your mic, then I'd suggest you to return it and get something else, or at least try something else. The problem is, that this is a mixer, not a proper audio interface. Of course they didn't quite work as expected, I do almost all editing in post. Actual audio source? Meaning the AT2020? And no, I was going to buy a $60 audio interface off Amazon but I saw this for a little more and thought maybe I could benefit the recording by having the dial controls over the LOW/MID/HIGH.
