I do agree that her quality has dropped a bit and her golden era is gone. She made some mistakes, sometimes she looked unprofessional to me either.
But it didn't affected me so much to stops to like her. She's still my favorite singer. As others said, different opinions are good as long as they're not just comments made for the sake of bashing.
The sad thing is, most of the criticisms are from her fans.
Reading people complaining about everything she does it's exhausting sometimes. Thank goodness there's a part of good people to compensate