1. Her albums are awful. Her singles are usually great due to the fact they were written by well-known songwriters with no input from Rihanna, however the rest is just filler TRASH. Loud and GGGB are her only good albums.
2. She's dumb as ****. She doesn't have a clue what she's saying in interviews and says stuff just to fit with the 'bad girl' vibe.
3. She couldn't perform if her life depended on it. As Rihanna fans clearly know (they seem to post the same 5 performances over and over), she has only managed to do the simple feat of putting on a decent show a few times in an 8 year career. Some artists (such as Madonna) don't have a single bad performance, never mind an entire career based on them.
4. She's arrogant and thinks she's a lot more than she really is. Her twitter 'clapbacks' that are just shallow drags are the worst
+ her last reinvention was with GGGB. she's been doing the bad girl image for a while now and judging by her album sales the public are starting to want something else...