She's often considered the face of the irrational exuberance behind the first dot com boom/bubble.

Rating many companies that subsequently lose 90-100% of their market cap as 'strong buys' is a pretty scary track record. IIRC, her portfolio of 'outperforms-or-better' lost ~80% of their value in one year.

Granted that the 'market can remain irrational longer than you can stay solvent', etc so she may not deserve all the scorn heaped on her (I haven't done the research to know ...)