Leaving NATO is not "isolationism".
And cutting ties with countries in NATO that repeatedly refuse to make the financial contributions towards defense that they pledged to make is also not "isolationism". NATO countries made a deal, part of that deal was 2% of GDP to defense, there are NATO countries that over and over have refused to keep their part of the deal, they promised to do something and year after year after year, broke their promise. Saying, "OK, we have had enough, deal is off" is not "isolationism", it's a common sense bargaining technique.
And "a strong affinity toward foreign autocrats", if it were true, would also not be "isolationism", it would be the opposite of isolationism. An isolationist country does not have a strong affinity for foreign leaders of any type.
I'm not quite an isolationist, but I lean that way. I wish Trump was an isolationist. I wish there was any major politician that was. Sadly, no.