The thing is, Sargon had nothing good on Jim.
If sargon came out with some kind of breakout hardline evidence about Jim being a nazi serial child rapist people would have been cheering sargon, but all the stream ended up being was sargon tripping over his own words and going on multiple ego trips while making unfounded accusations and complaining about his suit being made fun of.
Jim in general is liked because he knows how to handle himself. He understands internet culture well enough to avoid making a clown out of himself unintentionally or suffocating on his own ego.
There's next to no sitiuations or incidents where Jim ended up unintentionally looking like an exceptional individual due to ego problems or not understanding how banter works.
He can banter, he can take shit and he can send shit, that's why he's likable.