Take off the blinders for a second and you'll see Holly's record isn't that bad. While she couldn't keep Tennessee at the level we've grown accustomed to, that doesn't translate to her being a "horrible" coach. I'm sure if she wants to coach elsewhere, there will be teams interested.
It's actually the opposite, in my view. Her record looks good in isolation. When taking into consideration the level of talent she had on her team, then the record is pretty bad. Maybe good for Ole Miss, but not good for a team with 5-7 McD AAs at all time. If she was at a school other than Tennessee, I don't believe she could replicate that performance because a.) she wouldn't be able to recruit as easily (Tennessee practically recruits itself) and b.) lesser talent on her team + poor coaching = lots of losses. I don't think I'm alone in noticing this, which is why I believe she "retired". She knows that no one would be interested in her despite her relatively good record because she would not be able to come anywhere close to repeating that somewhere else. It's like she was dropped off at mile 20 of a marathon while everyone started at 0, and she's being congratulated for finishing 4th.