Can you elaborate? I happen to know nothing about Banksy's political views beyond perhaps he is slightly leaning to the left, maybe anti-capitalist?
The fact that the statue was allowed to stay up means that the authorities approved it. So, Banksy isn't really counterculture, he's government approved counterculture.
Authorization could be done with permits, or just tacitly by the notability of the artist. And while one can kind of do some handwaving and liken the latter dynamic to some mild corruption, that is still nowhere near the level of motivated corruption under fascism. And at this point comments invoking phrases like "established media" and "global bureaucratic regime" have a general thrust of pushing us away from liberal institutions and towards fascism, so I find those appeals quite disingenuous.