The one thing that Donald Trump is doing right is that he does not want to escalate conflicts with Russia. Those who are ramping up the antagonism towards Russia may not remember how bad and dangerous the Cold War was, with mainly the arms manufacturers benefiting from it. But we should not confuse a good relationship between the two countries, which is a good thing, with a personal friendship between the two leaders, which may or may not be good depending on what common interests they share.
As with all things Trump, even when he may be doing the right thing it may be for the wrong reasons. There is something undoubtedly weird about his deferential attitude towards Russian president Vladimir Putin, so unlike his attitude towards anyone else. He does not play dominance games with him the way he does with others.
John Oliver gives us some background on Putin and there seems to a lot of similarities between the two such as Putin’s ego, desire for wealth and luxury, autocratic attitude, vindictiveness towards his perceived adversaries, and self-aggrandizement. So the most benign reason for Trump’s attitude maybe because he recognizes a kindred spirit. But maybe the reason is more sinister and we will have to wait for somebody to leak that information.