limitations. KS is not a head coach that will take BYU to a Big12 championship. Let's ignore the P5's on BYU's schedule since KS took over. Let's focus exclusively on rivalries, G5 and FCS.

2016: L vs Utah, W vs Toledo 55-53, L vs Boise 28-27, W vs Cincy 20-3, W vs SUU 37-7, W vs UMass 51-9, W vs USU 28-10, W vs Wyoming 24-21
G5 record: 5-1
FCS record: 1-0
Rivalry record: 0-1

2017: W vs Portland State 20-6, L vs Utah 19-13, L vs USU 40-24, L vs Boise 24-7, L vs ECU 33-17. W vs SJSU 41-20, L vs Fresno 20-13, W vs UNLV 31-21, L vs UMass 16-10, W vs Hawaii 30-20
G5 record: 3-5 (8-6)
FCS record: 1-0 (2-0)
Rivalry record: 0-1 (0-2)

2018: W vs McNeese 30-3, L vs USU 45-20, W vs Hawaii 49-23, L vs NIU 7-6, L vs Boise 21-16, W vs UMass, 35-16, W vs NMSU 45-10, L vs Utah 35-27, W vs WMU 49-18
G5 record: 4-3 (12-9)
FCS record: 1-0 (3-0)
Rivalry record: 0-1 (0-3)

2019: L vs Utah 30-12, L vs Toledo 28-21, L vs USF 27-23, W vs Boise 28-25, W vs USU 42-14, W vs Liberty 31-24, W vs ISU 42-10, W vs 56-24, L vs SDSU 13-3, L vs Hawaii 38-34
G5 record: 4-4 (16-13)
FCS record: 1-0 (4-0)
Rivalry record: 0-1 (0-4)

*2020: Overall COVID year record 11-1
G5 record: 11-1 (27-14)
FCS record: 0-0 (4-0)
Rivalry record: 0-0 (0-4)

2021: W vs Utah 26-17, W vs USF 35-27, W vs USU 34-20, L vs Boise 26-17, W vs ISU 59-14, W vs GSU 34-17, L vs UAB 31-28
G5 record: 3-2 (30-16)
FCS record: 1-0 (5-0)
Rivalry record: 1-0 (1-4)

2022: W vs USF 50-21 W vs Wyoming 38-24 W vs USU 38-26 L vs Liberty 41-14 L vs ECU 27-24 W vs Boise 31-28, W vs UTU 52-26, W vs SMU 24-23
G5 record: 5-2 (35-18)
FCS record: 1-0 (6-0)
Rivalry record: 0-0 (1-4)

2023: W vs SHSU 14-0, S vs SUU 41-16
G5 record: 1-0 (36-18)
FCS record: 1-0 (7-0)
Rivalry record: 0-0 (1-4)

So, when we include the inflated record from the COVID year (2020) KS's G5 record is 36-18. As a program that aspired to be P5, this is completely unacceptable. Then, if you acknowledge 2020 for what it was and remove it from the overall record, KS's G5 record shrinks to 25-17, which is atrocious. Even if you give KS credit for a weak 2020 campaign, no BYU coach that goes 0.667 against G5 competition deserves to be retained.