I would say you lost because you didn't know a fucking thing about the rules and points.
Maybe next time do your homework and prepare accordingly. If you don't like the rules then don't enter.
But lets review:
A) A double leg takedown is worth 2pts. Very good.
B) A sweep is worth 2pts. Improving your position from the bottom to the top is worth the same amount of pts. 2.
C) It appears you got swept into the mount. The mount is an excellent position. Worth 4pts.
D) Escaping a bad position isn't worth any points. The same way you aren't awarded points for escaping side control or an armbar.
You lost 6-2.
Now you can debate the rules all you want. What YOU think is important and what YOU think should be changed. The bottom line is if you don't like those rules you can compete under a different set. You could go strictly wrestling rules where escapes ARE rewarded. You could go GJJT rules where takedowns are worth didly, and they reverse guard position after a certain amount of time. You could go with strict CBJJ rules. You could compete under NAGA/GQ rules. You could go Judo rules. Whatever you like. The point is there are many formats in which to compete. But if you don't know the rules and points under the one you are under then don't bother showing up, and certainly don't come to a message board to complain. You sound like an even bigger loser.