Blomkamp has lashed out at people before on twitter, so it's very difficult to discern his so-called "sarcasm". More like he's probably just doing damage control after he got berated numerous times and cooled down a bit.
Villeneuve (unlike Blomkamp) did "get to play in Ridley Scott's universe". 2049 then proceeded to bomb at the box office and what happens? Villeneuve gets to make another big-budget film based on one of the best sci-fi novels ever written (that also happens to be Villeneuve's favourite book),
Now Dune is getting rave reviews and Warner media have assured Villeneuve that he'll still get to make part two even if Dune underperforms at the box office.
Whereas Blomkamp has numerous big sci-fi projects that never came to fruition, Halo, Alien 5, Robocop, D9 sequel and now his latest film is getting negative reviews.
So one can understand why Blomkamp would be feeling a wee bit jealous towards this fellow Canadian director. Still very bad form to lash out at him like that.