I think most people hate Sabo for the wrong reasons. A lot of pleople hate him because he is Ace V2, but i disagree. His backstory, motivation and goals are different enough to make him a unique character, but that's just my opinion.

What i hate the most about Sabo is how Oda "fixed" the plot hole.

Why didn't Sabo try to reunite with his brothers in all these years?  He had fucking amnesia. That is the most ridiculous and BS excuse i've ever heard. The obvious explanation is that Oda hadn't planned Sabo from the beginning and only around Marineford came up with him and had to come up with a lame excuse as to why hadn't we heard of him before. And even if you ignore this, this amnesia still doesn't make sense. Usopp got hit in the head with a 5 ton baseball bat, and didn't suffer amnesia. People get exploded in every arc and this bs doesn't happen.You could actually replace any dead character with Sabo and use the same excuse and it would make as much sense as Sabo.

"Robin's mom is alive. Why didn't she contact Robin, she had amnesia from Ohara bombing"
"Kuina is alive and has been suffering amnesia from down D stairs"
"Bellemere survived the bullet, but the brain injury caused amnesia"

The way Oda fixed this plot hole is an insult to all the One Piece fans. And even then the plot hole didn't get completely fixed. Even two years prior Sabo was a prominent member of the revolutionary army and definitely had a bounty. Ace does look at bounties, we saw him show Luffy's wanted poster to Whitebeard in the flashback. So how did Ace not know about the number two of the revolutionary army? We saw that in the Dressrosa, even random pirates knew about Sabo. How the hell did Ace not look at Sabo's wanted poster and say "same name, same hair color, same facial structure and a scar, maybe this is my brother Sabo"

even with the most ridiculous and lame excuse, the plot hole wasn't completely fixed.
This is horrendous writing

Is there genuinely a worst way to "fix" a plot hole than this?