Malik Zaire simply didn't have "it" any more. Maybe the inkling of what we saw in 2015 might have been a decent QB, but after that, he completely lost his mojo. Throwing for less than 50% in 2017, and essentially tanking the Stanford game (he threw a short "I give up" pass instead of at least throwing it into the end zone) showed that he wasn't going to be a decent quarterback at the collegiate level.
Even when he got to Florida, he couldn't even beat out an injury-hobbled freshman Feleipe Franks. The fact that he couldn't win the starting job outright, showed that his level of play was vastly inferior to Deshone Kizer's. There is no way that you can argue this point. No way, no where, no how, and any attempt by you will simply show that you don't understand basic mathematics.
Kizer proved that he was an excellent college QB, posting even better numbers in 2016, despite not having Fuller, or any true #1 receiver that year. With even an average level defensive coordinator, that team would have been at least a 9 win group.
As for your trashing of Sam Mustipher (you gleefully accused him of tanking a game in the past), the bulk of us here are still rather disgusted at your accusation against him. Sam Mustipher gave it his all, and is a fine representative of Notre Dame as there ever were.