0 exp after round

completed a couple games of co-op, played as commander and actually played my role (calling in drones and mortors). So I personally never captured a point and at the end of the round I got 0 exp. even though i killed plenty and took out a technical with mortors.
Is there no exp gain for actually playing your role? Is the only way of gaining exp by personally capturing a point?0_1535680568490_20180830184118_1.jpg