Joe Manchin is a cancer in the pancreas of the US Senate.
Not a big fan of Manchin's negotiating style, but part of a loaf is better than none.
I also think you have to look at his full body of work. Consider the obstruction that Biden would be dealing with without Manchin. He's still confirming Biden's nominations and he's still backing Biden on infrastructure and COVID related bills. He's also backed Biden on regular appropriations bills.
I still have some hope (dwindling that is) that Biden and Manchin will work something out on BBB.