One politician cannot be held responsible for a bill not passing that requires the votes of many others.
It’s planned.
OP is right. Manchin gets the blame but 50 others voted against it as well, many who would be willing to cross the aisle but for the toxic partisan environment in this country.
That act changed section 174 in this stupid and extremely detrimental way.
So no. It was exactly "one party" (the Republican party) whose fault this is.