For someone who isn't a good coach, Holly's records are:
2013: 27-8, SEC RS Championship, Elite 8
2014: 29-6, SEC Tourney Championship, Sweet 16
2015: 30-6, SEC Co-RS Championship, Elite 8
Total: 86-20
She has improved each season in number of wins, while decreasing her loss total and dealing with season ending injuries to players expected to contribute.
To my knowledge, no one in the country has won more than Holly in those three years, other than Geno (113), Muffett (108), Kim (99), Tara (92), Jeff (89), Brenda (88) and Dawn (88).
Other than Geno, Muffett, & Kim, the others have been fairly even over the three year period.
Is Holly one of the best coaches in the game? I don't know, because I haven't seen what she can do with a full roster. Does she have some WTF loses? Absolutely! However, if you put her records up without listing her name, most people would agree that she has had a great three year stretch that a lot of coaches would love to have.