In just under three years in office, Trump has paid or been ordered to pay $27 million in legal settlements for fraud and charity-abuse.

This happened just last week https://www.washingtonpost.com/politics/trump-ordered-to-pay-2-million-to-charities-over-misuse-of-foundation-court-documents-say/2019/11/07/b8f804e2-018e-11ea-9518-1e76abc088b6_story.html

Then there's the fact that Trump has refused to divest his stake in his company, opening himself to unprecedented conflicts of interest—allowing wealthy interests and foreign governments to personally enrich him while trying to influence him https://www.citizensforethics.org/trump-conflicts-of-interest-tracking/

I could do this all day. The fact of the matter is that anyone claiming that Trump cares at all about corruption has the burden of proving so, against a mountain of evidence to the contrary.