Is there an artist that is universally recognized, but that you don't like for purely personal reasons?
Not for me; I try to judge the product, not the person.
I've found plenty of reasons to dislike some, however. Plenty of conductors whose music I've enjoyed, including Charles Dutoit and James Levine, have been implicated in sexual harassment situations.
One of my favorite conductors over the years was Johannes Somary who died 2011. I never knew this previously but the Internet is full of documentation from former students of a New York school he ran that for decades he sexually molested them.
Robert King, a mostly Baroque conductor from England, did a prison term for sex with underage children.
I have Jewish friends who never bought or listened to recordings by Karajan or Karl Bohm or others because or real or imagined links to Nazism.
I have admired the violin playing of the artist known variably as Nigel Kennedy or just plain Kennedy though many I knew eschew him for his extra-musical antics, his appearance, and his alleged syrupy or cloying style of playing.
I thought Bernstein and Mahler such a good pairing because they were both mixed up guys -- Bernstein because of his sexuality, Mahler because of his religion.
Bernstein, son of a shoemaker, was a self-taught musician who grew up traditionally as a husband and father. In mid-life he left that to become a gay man in New York with a partner. He later returned to the other role. I knew people in my life like that; their lives were tortured.
Mahler was a Jew and wrote a symphony about the act of Christian resurrection. Jews who practice religion don't believe in the New Testament or Christ. Unlike Mendelssohn, whose father left the Jewish faith and converted to Christianity, then taught it to Felix and Fanny, Mahler alwasy seemed to me unsure of much in his life.
I knew people like this in my life and, while not separating from them, was fairly exhausted by the drama of their lives. Mahler's music regularly exhausts me, especially with Bernstein conducting it.
I've performed and worked with conductors and musical artists of many types that I did not like personally, did not enjoy working with, and/or had extreme differences on artistic style but, if the final product was good, I forgave or put that aside. The object was producing a show, not feeling good about everything.
I've found in life it's what you make of opportunity that is more important than how you feel about it. Same with people.