Judging scoring criteria is really bad and doesn't make sense

This is really bad judging or scoring criteria. Just rocked someone standing who missed almost all their punches and I dominated them for 2 rounds of top control and he won off a sub attempt in the last seconds and I've definitely beaten him before. It was too easy and they gave him the decision off a sub attempt that I didn't even bother defending because it was last seconds desperation that didn't even get the sub. Just wow