Yeah some of our fans are very salty about it all, every club can refuse and should do so if they feel needed to. I think only time it can be forced is by the players which in turn usual leaves them on bad terms with parent club/fans forcing a sale.
I think clubs will sell less this window in general due to the transfer fee being bat **** insane. Much harder to replace players with known quality now than before, English sides do tend to pay more too just due to vast amount of money we get from TV etc compared to other leagues