Donald Trump has faced a number of controversies over the years. The most prominent of these have been about his personal life, not his business practices.
The major controversy surrounding Trump has been about the women in his life. He has married two women much younger than him. The first of these women was one with whom he was having an affair while still married to his first wife. His divorce from his first wife was a very protracted thing with lots of anger and publicity.
Trump has also been controversial because of his seeming love for publicity. He has had his own TV show and has run for president, seemingly only as a way to get publicity.