Yeah people still play lol.
Free Step Dodge
iHajinShinobi
VAND1TA
There are still people on the PS4 that play DOA obviously, I just played some people a few minutes ago.
YBNDM
People still play DOA, but there is less/different players getting into the game.
Hazard
The people you used to play with are prolly either on PS4 or dropped the game. Xbox online isn't dead but it's sure closing in on it.