I can so relate.
It's easy to picture all the cool designs of the PT or get nostalgic for the hype around the trailers and everything and get halfway excited to revisit them...until you actually start watching them again, lol.
I know right! The worst part is that his line delivery is just so off and poor compared to Jason Wingreen. I was even open to hearing TM's take on a grown Fett back in the day until I heard how he said the lines. Did George specifically direct him to lose all of the menace of the original voice? Was he supposed to sound like an obedient clone instead of a snarling badass? "I want them alive, no disintegrations." "As you wish sir! Right away sir!" Ugh.
You'd think he was redubbing C-3PO not Boba freaking Fett. "He's no good to me dead, though I have been known to make mistakes...from time to time."
And it's even more infuriating because TM does a really good job in Mando! He has a gruffer voice that might have even been acceptable in ESB. But no he has to sound awesome on a TV show and like a wimp in *The Empire Strikes Back.*