1. Sanctioned NS2
Sanctions for the project began at the end of 2019 under Trump and ended sometime around 2021. However, this is largely unrelated to Russia's ambitions to invade Ukraine other than it has some financial benefits. THE NS2 is still being built and the project may now be shelved indefinitely as Russia's recent actions have made the other end of the benefiters of NS2, Germany, forced to pursue alternative fuels.
2. Ended treaties that Russia wanted us in (INF, OST)
Russia had already invalidated the INF treaty. Withdrawing from it only gives the US the edge to leverage a future Russian leader to reinstate the treaty. This hardly did anything to stop what Putin was already doing.
The OST treated was pulled out because Trump wanted to limit China's airspace despite Russia honoring this treaty. Because Trump was hoping to use the pullout as leverage against China, he basically gave the Russian's more opportunity by pulling out instead of just negotiating a separate treaty with China.
3. Grew military
Yes, he grew our military. Not Ukraine's. We can't move on Ukraine during the Russian invasion unless Russia strikes a NATO ally first.
4. Annihilated Russian paramilitaries in Syria
Has nothing to do with Ukraine and while it is a disadvantage to the Russian's I fail to see how it would've prevented the invasion now.
5. Sent lethal aid to Ukraine early as 2017
This has something to do with Ukraine! However, in September of 2019, Trump threatened to pull this aid as he wanted to use it for leverage against Zelensky for any incriminating evidence his government may have. As these matters concerned political espionage, utilizing an existing officer's power over a foreign one, and had no meaningful basis for using that power other than for personal gain; this action would've completely negated any good will Trump built up in defense of Ukraine. Indeed, if he weren't caught by White House correspondence, this would've left Ukraine open for an even earlier invasion.
6. Struck Syrian chem plants despite Russian presence
Has nothing to do with Ukraine and while it is a disadvantage to the Russian's I fail to see how it would've prevented the invasion now.
Yes, many of these are a blow to Russia but the fact of the matter is, Russia still invaded despite these efforts. So they did nothing!