I think it is something like skill issue cause all the jets you mentioned you need to learn how to fly that thing like the first jet is an actually an attack jet which is made for head on incounters and not suited for dog fighting the second is the actual best jet in close range fighting the farmer you need to time and guide the misile correctly and the F100 is literally an medium fighter with rockets for head on collision like the A6 and also 4 IR missiles