I believe Heller, Citizens United, and Garland all happened longer than 2 years ago. I need a stronger argument from you. Please try again.
2 years ago it was October 3, 2016. Merrick Garland's nomination was sitting in front of the Senate waiting for a vote. If the Republicans did not have the majority, he would have been confirmed for the seat previously held by Scalia. That alone would have flipped the majorities for both
Heller and
Citizens United. It also would have meant that Obama's Clean Power regs (which the Court that included Gorsuch tossed), as well as DACA, DAPA, etc. would not only have been withheld, but made mandatory to continue.
There is also the tax cut/reform bill passed by the GOP Congressional majority.