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Never liked SpongeBob, everyone else was better than him
I think this is the transition from childhood to adulthood. It's kinda like Tom and Jerry.
Once you're a kid, you're a Jerry fan, rooting for the mouse, annoyed by Tom. Once you grow up, you realize Jerry is an absolute asshole and poor Tom has to deal with his bullshit. >

When I was a kid, I always wanted Gargamel to catch those smart Alec smurfs. >

Unpopular opinion? Next thing you're gonna tell me is that Zack Morris is trash! >

Congratulations, you've grown up.
The true measure of adulthood is whether you consider Squidward the victim or villain. >

Neither are assholes just two incompatible people forced by economic circumstance to be in close proximity. Neither of them are “bad” people >

The funny thing is Squidward can move, in fact he has before. 
There is that one episode where he moved to a neighbourhood with people not that different than him. 
Problem is, after several weeks, he realized how boring it is and moved back. >

This heavily depends, there have been some episode where squidward was an asshole who bullied SpongeBob. But yes on average SpongeBob is the asshole >

like that time he read his diary to everyone. >

Is this really unpopular? I think most people agree on that >

Never heard it >

It doesn't have to be just one of them. Spongebob is an asshole for not leaving Squidward alone, and squidward is an asshole for being rude to everyone and everything around him. >

SpongeBob clearly has a man crush on Squidward. Plus he lacks serious boundaries. When a person says leave me alone leave them alone.