Once again, you don’t know what you’re talking about, since you’ve never used them.
Front aspect, especially in direct headons, they’re mostly useless. The range at which the IRCCM would prevent flares from spoofing them is also the range where the proxy fuse won’t have armed in time to actually fuze on the enemy plane. And anyone who isn’t preflaring when jousting an enemy plane that has all aspect missiles is already making a mistake.
Side aspect, it’s not at it’s best, but can work. But this is where the problem with the F1’s flight model come in. It’s legitimately hard to pull enough lead to get the missile close enough, fast enough, if your enemy isn’t stalled out, doubly so if he’s actively evading you. I generally find the most success here treating it like any other all aspect missile, and trying for longer range ambush shots where the oppposing pilot never even realizes he’s being fired at, but the IRCCM often doesn’t factor into this. It’ll bail you out if your opponent notices the missile late, but that’s about it.
Rear aspect is where it’s at it’s best, but again, the flight model issues mean that if you slot in on someone’s six, and they see you and start pulling, you just aren’t going to be able to keep up unless they’re stalled out.
This is still the best chance to make it work, and it often will, but this all came about from managing to get the boat of an F1 onto someone’s six in the first place, and that isn’t simple. Ask yourself how many times you’ve managed to comfortably slot onto someone’s six at close range with the F-4C, then extrapolate out to an F-4C which handles even worse, and is up against much better fighters. The F1 can see F-16s in a partial uptier.
And it’s worth keeping in mind, this is all just for two missiles. On a platform that has made massive sacrifices in all other aspects in order to have two strong missiles at the tier. And once those two missiles are gone, there’s really no redeeming features about the plane, aside from a boat load of countermeasures and SARHs that don’t ping RWRs (But are instantly spoofed by chaff in almost all situations).