The Master and The Doctor dynamic is really funny in comparison to other versions of the "hero and villain used to be friends/sort of still are friends/you could interpret them as ex-lovers" trope. Most versions of this trope like magneto and sinestro are well-intentioned extremist villains so you can see why they used to be friends and where their ideologies diverged. Whereas The Master just straight up commits mass murder for fun. Yet The Doctor is so unhinged that the Doctor Who fandom universally accepts this without question. We're all just like "yeah that seems like the kind of guy The Doctor would hang out with".
This shitty meme brought to you by "bel finally watches classic who and realises there's no exaggeration whatsoever in how well this ship's been sailing since 1971"