Mostly, no. I've been huge fans of Rihanna, Gaga, Bey, Drake, Adele, Nicki, etc. for a long time. Ari recently. I'm sticking with them for good because they pretty much always deliver.
I have done it with a couple of artists, though, mostly if I really just start to detest their actions. This has happened twice recently - I won't name names but you can probably guess. A shame because they still make good music but they've proven to be people I really just don't want to support.
Chris Brown but not entirely bc I still support his music when it's good and purchase his albums. I just don't follow his life or career anymore and I don't really care when he's involved in drama and how it may affect him negatively.
I used to LOVE Ciara. Whatever happened between "Get Up" and now is a complete blur to me. That was the last time I loved her.
Some artists I've kind of just grown out of with age - I used to love K$'s music but I can't listen to it anymore besides TiK ToK. I would still look out for her future releases, though.