Yes, but most of the time it's accidental, for example there are two legal king moves and you make one at random and the computer says it's brilliant because it sees a 20 move sequence you avoided. I've got one legitimate, intentional brilliant move before as part of a checkmate sequence
Has anybody ever gotten a brilliant move?

Except a chess.com user named Hazemshaheen made a brilliant move against me once and my game fell apart after the move

I have had one, it was pretty easy to see, I know because my opponent resigned right after I played it.

Yes. On move 14: https://www.chess.com/analysis/game/live/7488843489?tab=analysis
Don't ask me why it's brilliant though.

Not so far, but I've only really been playing for a month. I feel freakin' brilliant when it says that I found the only good move, though... if only I did that more often

Yes, but most of the time it's accidental, for example there are two legal king moves and you make one at random and the computer says it's brilliant because it sees a 20 move sequence you avoided. I've got one legitimate, intentional brilliant move before as part of a checkmate sequence
Is it just me or has ANYBODY ever gotten a brilliant move is chess.com?