The Soviet Union gave the equivalent of about 80-100 million USD in support to the ANC in South Africa in the 1970s and 1980s. As soon as they got power, the ANC turned around and aligned with the west, wasting every rouble Moscow spent.

Since the inauguration Trump has supported physical seizures of many different kinds of Russia-aligned merchant shipping and the economic degradation of Russia's allies. Given all of this, we can assume that the Russian asset angle is a much less accurate explanation for Trump's behavior than the alternative theory where he is highly suggestible to the most recent person to heavily compliment him in-person which used to be Putin and has subsequently changed to some mix of Rubio, Vance, Hegseth, Netanyahu and the Trump family.