In your opinion, what are the top 5 worst professional musicians and/or groups since the year 2000, in any genre?

I don't really have specifics as far bands or people but I do for genres. The electronic genre is the worst, in my opinion. It feels like they take random sounds and computer generated noises and add a hard beat and call it music. Sometimes they add strange and just as useless lyrics and call it a song. 

There are, of course, exceptions to this opinion. The music of Lindsey Stirling and Blackmill show real talent in the electronic genre. Lindsey Stirling creates a nice electronic sound to compliment her violin playing and dance moves. Blackmill incorporates the sound of the piano and violin with a soft electronic sound. Good luck to you!