Low fuckin' bar for "hero" these days.
Absolutely not how I would frame things, but Manchin is a DINO. If he hadn't "flipped" on his earlier recalcitrance, the only Biden administration legislative win would have been very early in 2021: the American Rescue Plan. Manchin was on track to scuttle everything after that, and it's unclear what he received in exchange for his party loyalty.
This covers Jan 2021-Jan 2023. I won't dive into Manchin's record prior to that, but he's known to be swampy.
IF you value Biden's legislative achievements, then you necessarily have to acknowledge Manchin's importance in those votes. But as it turns out, much of the electorate that votes for Democrats doesn't think much of BIL, IRA, CHIPS act, etc. Or they don't even know about these wins!