'DWTS' Alum Maksim Chmerkovskiy Labels Anna Delvey A 'S****y Dancer'

9/24 9:52 AM PT -- Anna Delvey took to her Instagram to respond to Maksim Chmerkovskiy's critique of her dancing he gave on "The TMZ Podcast" ... posting "Who is this Maksim person? He must be poor."

'DWTS' alum Maksim Chmerkovskiy is making it crystal clear that controversial socialite Anna Delvey -- ankle monitor and all -- has no place on the dance floor!

Maksim didn’t pull any punches on "The TMZ Podcast" ... telling us he thought Anna was a "s****y dancer" and adding her standoffish vibe definitely won't win her any fans in the competition.

Maksim also dismissed the excuse that Anna’s shaky Cha Cha was just nerves ... telling host's Charlie Neff and Brendon Geoffrion he didn’t buy it for a second 'cause conning people takes guts and self-control -- something he said she has bundles off.

But, Maksim didn’t stop there -- he slammed the idea of letting a "professional liar" compete while countless dedicated dancers who’ve put in the work get overlooked. You’ll want to check out the full clip to catch all his fiery takes!

Of course, Maksim ain't flying solo in his discontent -- Anna’s been fending off a wave of critics ever since her casting news broke, proving she’s got a lot more than just dance moves to handle!

Judge Carrie Ann Inaba dove right into the drama on the season premiere, urging critics to cut Delvey some slack despite her shady history.

As Anna tries to twirl past her naysayers, Maksim’s busy enjoying family bliss with his wife, Peta Murgatroyd. The couple are giving fans a glimpse into their happy home life with their new YouTube series, "The Maks and Peta Show."