Because every single president does the same exact thing.
What are you talking about?
Biden got about as much as he could get through a Republican controlled House and a filibustering Senate: a major COVID relief bill, a major infrastructure bill, and a major environmental reform bill.
Trump did a shitload in his one term:
- Replaced 3 Supreme Court justices and a lot of lower court judges who went on to overturn Roe v. Wade and Chevron, deliver a shitload of conservative decisions, and block a bunch of Biden executive actions (including student loan forgiveness, all sorts of COVID policies, and a bunch of economic regulations).
- Major tax cuts in 2017 for corporations and high earners
- Withdrew from the Paris accords and rolled back a lot of Obama EPA regs
- Made shifts towards privatization of k-12 education, including towards religious private schools.
Obama signed a bunch of stuff into law his first two years:
- Obamacare
- Universal healthcare for children under S-CHIP
- Student loan reform, creating public service loan forgiveness and much better repayment plans while cutting out private lenders who took all the upside with none of the downside.
- Lily Ledbetter Fair Pay Act
- Repealed Don't Ask Don't Tell
- Passed Dodd Frank, including the creation of the Consumer Finance Protection Bureau
- School lunch reform
Bush campaigned on tax cuts and got them, and then got a bunch of other stuff in from his first term related to 9/11 and the aftermath: The Patriot Act, authorization for wars in Afghanistan and Iraq, etc.
If anything, presidents are far less effective their second term than their first term.