19-21 in rhe SEC is a great coach?
You have to look at where Ole Miss was when he arrived. They were 1-15 in the SEC the prior two years. They were 2-10 the year before he got there. They went from 2-10 to 7-5. Three of their five SEC losses in year one were to #1 Alabama, #7 Georgia and #8 LSU. LSU beat them 52-3 in 2011. In 2012 in Freeze's first game vs LSU it was 32-29. Miss State beat them 32-3 in 2011, Ole Miss beat them in year one with Freeze while Mullen had MSU in the top 25.
By year 3 Freeze beat #3 Alabama, #14 Texas A&M in College Station, and #4 Miss State, Mullen's best team in Starkville, and won 9 games.
There's always context when looking at overall record. Freeze made Ole Miss a high scoring, hard to beat team.
Look at it this way, Freeze whipped Saban head to head twice, he whipped Mullen multiple times, and lit up Kirby Smart both when he was Alabama's DC and his 5 win team beat Smart's 8 win Georgia team 45-14. That same 5 win team played vs Alabama with Pruitt and their #1 in the nation scoring defense and put 43 on them. Clemson scored 35 on Alabama in the title game. 12 other teams they played that year scored 16 or less points.
Freeze can coach, and he has done extremely well vs the three coaches we most need to beat. He just wasn't great at hiding cheating. Granted, Ole Miss was mired in massive cheating when he arrived, the cheating was in place from boosters and people above Freeze in the athletic department. They had to forfeit whole seasons from before Freeze even started.