agreed this sounds like political activism judging. how can one judge say we can’t extradite to the us because the system isn’t good enough when other extraditions are ok?
The judge interprets how the law applies to the specific facts of this case. The law says extradition is not allowed in some circumstances. Those circumstances include how the prisoner is likely to be treated, and the health of the prisoner. Some other extraditions are ok according to the law because those factors vary in each case.
https://www.legislation.gov.uk/ukpga/2003/41/section/91
There have been extraditions of other people charged with computer hacking offences like Lauri Love and Gary McKinnon where there was a similar concern. In both Love and McKinnon's cases, both were on the autistic spectrum.