What about Build Back Better?

Along the same lines, BBB that passed in the House is over 2000 pages long and is so complex it takes a bureaucrat to understand it. It was one of the legitimate reasons Repugs voted it down in the Senate. Granted it's rare indeed when they have a legitimate reason but this was one of them. So why have the Dems then not tried to pass simple, stand-alone Bills on specific issues from BBB?

Note: Bernie for example is indeed pushing to pass a renewal of the Child Tax Credit. But Repugs oppose it, as does Manchin in his own Party. So that too is standing in the way of such stand-alone Bills. Still, the main point stands that the Dems just have to throw everything including the kitchen sink in most Bills. 

PS: Taking the above example, when we focus on such stand-along issues like the Child Tax Credit it makes it much easier to reinforce the accurate frame that Repugs hate children once they are born. It also makes it much easier to attack the likes of Manchin, again accurately framing him as one who takes blood money to sacrifice children.