My Freya was noisy using tubes ( I heard they addressed this problem recently)Many hundreds more have not had this problem, they are spec’d at 115db s/n for the tube stage, as good as many $5k tube preamps, you obviously had dud tube/s in yours. And Schiit honoured replacements tubes for those, if you complained.
Sure you don’t get exotic tubes for that price, but you find 9 out of 10 owners experiment with better brand of tube anyway, they love this preamp so much.
Cheers George