Their US and Australian divisions are solid. The UK one varies, and has some decent people, but also has a persistent infestation of TERF/SWERFs. A few high-profile ones have left after their comments became irreconcilable with the paper’s ostensibly liberal/progressive line, but you still get regular Observer opinion columns about pronoun-mongers sexualising our children or other scare campaigns. There’s a rumour that the editor, Kath Viner, is herself a TERF and personally protecting them, though I haven’t seen any evidence one way or the other.