We, the UK, don’t decline extraditions on that basis - the prosecution has to be manifestly unjust in the sense of no real case to answer, or the destination has to literally be a banana republic.
Supporters may hate this, but it’s not actually what’s at issue at this point in the legal process.
Yeah, obviously “he’s going down” but not because of bias - he’s simply not exceptional (or motivationally pure) enough to be above the system.