Firstly, Satan opposes both Jesus and Jehovah who are, in my opinion, villain protagonists.
That alone is a significant point in his favor, in my opinion. Jehovah openly boasts about being wrathful and jealous and demands his people to fear him. That's not to mention that he's a tyrannical diva with a God complex. He's one of the most evil characters I've seen depicted in any medium.
Jesus is not much better. While Jehovah was mostly content to brutally murder anyone that got in his way, he only tortured people in horrifyingly surreal ways for special occasions. By contrast, Jesus condemns anyone to Hell who does not make him the exclusive focal point of their lives and worships him. That is an eternity of ceaseless torment, by the way.
The fact that Satan tries to trick Jesus into eating rocks is, while immature, kind of understandable in that context. It's not just an attempt to get him to break his fast in order to be unable to continue glorifying himself as the righteous, unblemished lamb of God, which is his excuse for condemning people to eternal torment to begin with. It's also an attempt to, in doing so, humiliate him. I disagree with that, but I know many people find the need to "humble" the haughty and Jesus is the one claiming to be basically the most important human who ever lived.
Secondly, what we hear about Satan is mostly from Jesus talking behind his back, who demonizes him thoroughly. Maybe Jesus knows the subject better, but his judgment is pretty poor. He calls his own apostles fools, compares begging women to dogs, uses allegories that imply that he wouldn't ordinarily expect a Samaritan to do the right thing, and physically assaults people after losing his temper in a temple. Are we really going to take his account of Satan as accurate?
Thirdly, if we do take what is said about Satan to be accurate, what is it that is actually said about him? He leads mankind into spiritual death. Given the way Heaven is described in places like Ezekiel, which feels like a celestial North Korea with Jehovah on top, that might be preferable. Especially given the earlier complaints about Jehovah.
We also know that he tempts mankind into sinning. Except, the Biblical narrative presents sin as disobedience to Jehovah and his draconic mishvot that have no real rationality to them. And, again, it's disobeying Jehovah, who I think is probably not the best being to listen to.
In fact, much of what Satan is accused of doing is getting people to question their faith in Jehovah and to focus on more material matters, which I actually think is pretty sound advice.
The closest we get to a description of Satanic action is in Jude 1:6-9. I would hardly call blasphemy, disobedience, dreaming, and fornicating evil.
Outside of Revelation, which is a notoriously controversial work with many different interpretations, the worst thing Satan does is in Job. Which is, to be quite honest, not defensible. Still, Jehovah, Jesus, and the majority of Biblical heroes performed actions that were way worse than what Satan does. Samson alone killed more people.
Even if we accept that Satan is the snake in Genesis 2, all he did was free Adam and Eve from the ignorance that kept them enslaved to Jehovah. He didn't even lie; they did not die the day they ate from that fruit and they really did become like the gods in that they knew good and evil. It was Jehovah who cursed them. More likely, Satan is actually being identified with Leviathan when the New Testament identifies him with the serpent, though, and the Leviathan is the monster that helped Noah escape Jehovah.
Most, if not all, of what Satan is lambasted for is merely opposing Jehovah. The Bible does say that he is a murderer and vaguely maybe blames him for a war that may or may not happen in the future, but it doesn't exactly go into detail about those things. And again, even if they were true, Satan still ends up the clear moral victor over Jehovah, in my opinion.
I am more mystified by the fact that people still willingly worship Jehovah and Jesus than by the fact that some people willingly become Satanists.