I’d recommend you to tough through it and use the Skyflash, yes there are bad moments for the Missile but overall I’ve found it extremely reliable and especially within 4km (99% hit rate at 4km).
Skyshit Supertrash is really strange sometimes
I honestly don’t get it sometimes, I fired a Skyflash SuperTemp at another MiG-29 once going head on with me and it casually evaded the Missile (within 5km).
I doubt it would and this is just a issue with the Skyflash or all Missiles overall (I think) and I’d recommend you to stick with the Skyflash.
Try the AIM-7E for couple games and if you struggle with it go back, testing wont harm anyone and we all play different at the end of the day my friend.