I heard it was because he picked a banned character (Akuma) and that the tournament was being run on the PS1 version, which was known to have several glitches. But yeah, DSP is pretty much the biggest fraud in the FGC and the bottom of the barrel. It's only a matter of time before the guy's stupid YT career goes down the toilet. Then he'll pretty much have nothing left.
DSP trashes RE Code Veronica because he left Chris with no items and argues with the stream chat. This is hours before he tries Street Fighter V's Kagemusha Netcode in the SFV Beta.