Actually there were a lot of clear disciplined exemplary work shown by the IAF. Not only did a lot fewer aircraft deterred a large formation.
Fighting in fighters Is all about taking advantage of momentary situational and tactical advantage.
One has to keep in mind fuel status, weapons status, critical assets near by, ground defenses, friends and foes etc.
Till there is a clear advantage, any self respecting pilot won't really engage, while some armed chair pilots here keep talking shit about why MKI didn't fire don't really have a clue on how fighting in the air works.
Those MKIs in most likelyhood were already on patrol when the were vectored in towards the threat, with an approaching threat, in all likelihood they went into mil power and tore through and super sonic speeds only to find Aims fired at max range heading their way, while they can jam them, they still need to perform evasive maneuvers at high speeds, sharp dives and turns while chaffing. All this consumes fuel. While the MKI has a big tank, at full burner will drastically reduce range quite quickly.
Those Aims were not defeated by jamming alone, keep in mind the Aim has a reliable home on jam mode, they still had to release chaff evade ricky-tic. I don't care what anybody says but a group of 10-12 of our own going up against 20-24 targets is never good, be it in a Rafale or MKI. With Wing Co having delivered a lethal blow to one of their shiniest birds, those Pukis ran and we were glad to be back on the ground too.