One of the surest ways to attract criticism is to lead. When you lead, people will inevitably find fault. That ought to come as no surprise.
Gideon had simply done what God had told him. Yet people complained for not having been included. Now that victory seemed assured, everyone wanted to participate!
Gideon could have lost much of what had been gained had he become petty or resentful of his critics. Had he divided his people at that crucial time, it might have allowed his enemies to regroup and to retaliate. Instead, Gideon chose humility. He did not try to defend his actions or to angrily defend himself. He chose humility. As a result, the naysayers were satisfied, and victory was assured. Some people would rather be right than victorious.
By his response, Gideon demonstrated much wisdom. He proved that God had known what He was doing all along when He chose the timid farmer.