What? Of course it isn't! I mean, I guess you could argue that it's technically a slur in the sense that it is disparaging, but obviously the guy knows that he's being disparaging- you use that word to draw connection to identitarian slurs which are inherently wrong, and bureaucrat is not that. It also refers specifically and exclusively to the parts of the government that aren't democratically elected; the opposite of what you're saying.

Even setting that aside, 'the fat cheeto and his deplorable clowns in congress' is a slur for a democratically elected government, "the will of the people". So what? We shouldn't be allowed to insult a democratically elected government for some reason? Democracies are certainly preferable to autocracies, but that doesn't mean 'democratically elected' is a synonym for 'good'.