I understand what they were trying to do with the ending of better call saul, but to me it just didn't work. Breaking Bad ended in a satisfying way that wasn't really surprising, but it felt right. It was inevitable. Better call saul didn't have the benefit of inevitability. Everyone basically went into the finale with no idea what might happen, and they forced a character redemption through really impractical means.
He could have changed for the better without spending his life in prison. He already had a deal. He could have just kept his deal, spent a few years in prison, and then become a productive member of society. Is it really supposed to be better than he'll spend his entire life as a drain on society in prison? He got Kim's respect... I guess that makes it worth it. Glad the taxpayers will be paying to house him for decades so that Kim could respect him again.
It was a great show, but it had its flaws and the ending just didn't work the way they thought it would.