This seems aggressively mediocre, and oddly put together all around.
The episodes (at least the first three) are short for streaming (~42 minutes), but standard length for ad-run television. But the profanity (and violence, depending on the country) seem like they'd be a tough sell for any western broadcast channel.
The setup seems very clunky - the bad guys essentially win at the end of the first episode. Usually your hero has to be incapacitated somehow - coma, out of country, amnesiac, etc. - for the bad guys to win, otherwise it just seems like the heroes were incompetent in the first place. Nope, here the bad guys just win instantly. Unless the show's storyline is the moles were the _only_ reason the bad guys won, this setup just makes you question if the heroes are worth rooting for. (Also giving your evil empire distinctive tattoos seems like a bad plan for spy work. Just saying.)
Speaking of moles, the amnesiac chips, memories in a vial, twin henchmen, etc. all scream easy opportunities for any character to turn mole at any time. (I fully expect original recipe Robb Stark to be the primary mole.) I'm a sucker for a good heel / babyface turn, but they should be supported by hints in prior episodes that are meaningful in retrospect. Here, we find out fifteen minutes later that a character that was amnesiac was also a spy. What a non-twist, and also defuses the only tension by giving a lead an easy out from not being married to the other lead.
I've heard people refer to some shows (such as reality trash) as laundry folding shows, and I think I would put Citadel in the same territory - it's currently just not engaging enough to be a show you watch unless you're already doing something else.
