Those 500+ members of Congress each have a staff of around 10 (if in the House) to 50 (if in the Senate) working to help draft write these policiess but we'd be paid peanuts ($50k/yr in a city where rent for a studio is $2-2.5k and paying for 6 years of student loans - undergrad+grad school). You ain't getting good talent if you ain't paying for it. Those of us who know shit leave for the Private Sector. In general from my time working on the Hill, actual relations between most Congressmembers in both parties are pretty congenial and drama free. It's the pay gap that actually effects policymaking.

Alternatively, the Federal Agencies (which do pay decently btw) end up implementing Policies and Directives on their own that tend to make sense. Congress is a laggard compared to unilateral action that Agencies and Regulators like the SEC, CISA, DoE, DoT, etc can take, but those actions are only bandaids because they can be rolled back when bosses are changed.