Why this move is brilliant?

How is it possible that this user went from 1200 to 100 rating?

Bro I missed the blunder, I never expected it

My first brilliant move

Why is this Brilliant?

Forked the whole squad - lost anyway

How would this be bad for me?

What about it?

It says this wins my opponent material, when I hit show moves it shows white sacrificing the rook. I had checkmate in 2 moves. I don’t get these analysis. Most times helpful but this one is weird.

Playing chess with my bf for the first time 😢

I've had a lot of ups and downs over the last 3 years, but I'm finally 1600!!!

Never resign!

Why is rook to c1 not only a good move but the best move?