Yes, he is an idiot. No doubt about that. But.

He opens up the eyes of Whites on racism.  Statues are toppling, confederate flags are mostly gone, police forces are restructuring, corporations are changing their white-centric ways and much more.  None of these would have happened without Trump. Washington Redskins is changing its name after close to a century.  Aunt Jemima is no longer available.  Eskimo Pie is being renamed......

Despite trade wars, China is finally free from the grip of encirclement.  The US dollar currency reserve is no longer as powerful.  SWIFT, the only way to transfer money in the world, goes through New York is subjected to US regulations and key to US embargos and sanctions is losing its grip.

Europe is no longer allying tightly with the Anglo-Sphere.  Many Asian countries are beginning to undertand the need to ally with the Sino-sphere for the sake of their own survival.

India, as usual, made decisions based on delusional pie-in-sky myths, thought it can now grow, took the wrong step by being aggressive and is going to suffer for decades as its economy is struggling to sustain a 4% growth during the Covid-19 phase and will struggle to maintain a 7% growth post-Covid when it needs double digit growth to create enough jobs for the "demographic dividends" that are coming of age and entering the job market.  

Post-Trump, the world will be different. It will be a post-colonial era and Anglos will no longer have all the say and the Western media cannot easily dehumanize non-Whites to maintain superioirty.