I won't say you're wrong about yes he made it worse but he did ultimately accept the compromise version and help make it happen, but even that is a sort of charitable reading. He waited until the much more aggressive first iteration had gotten most of the way through to completion, and then fucked it all up (presumably in the hopes they'd just give up), and so everyone had to go back to the drawing board and do it again with a pared back version, which was the Inflation Reduction Act, and then when that passed he took all kinds of credit for it, even though he still did his best to kneecap its actual implementation when it came to anything that might lose money for any of his campaign contributors or personal investments, which are many and mostly destructive.
It is almost impossible to overstate what a piece of shit Joe Manchin is.