They've both got huge egos and like to hear themselves talk. A public blowup was inevitable because they were never going to agree on everything.

TCJA extension - Meh
Medicaid and welfare reform - Good
Removing gender transition from Medicaid - Good
Cutting green shit and opening up federal land - Good
"Opportunity Zones" - It's always been a scam.
Making states pay more SNAP benefits - Good for pushing it off to the states, bad for continuing these programs.
Removing silencers from the NFA - Nice
Repealing the $600 reporting IRS requirement - Good

But I'm sure it's filled with an assload of pork to make it pass. I like Elon, but he's an idealist. That's great for R&D and futurism, but it's lousy for dealing with the realities of politics. I think he's wrong here. Maybe Mars will have a budgetary system.

Personally, I'd have voted for the thing just for:

The bill requires colleges to have skin in the game by
paying a portion of their students’ unpaid loans based on
how much of a return on investment the degree provided.
Institutions that continue to saddle their students with debt
eventually face increasing penalties and risk loss of access
to federal student aid.

The racket of having tax payers foot the bill for worthless degrees while fucking over the students and funneling the money into billion dollar endowments ought to be criminal.