It would be easy to say that their aren’t any “good guys” in this conflict, but I would say Assad is better than ISIS and the hodgepodge of other factions that oppose him.
Problem with your calculation is it’s not just Assad we’re dealing with here. It’s Assad + Iran ($100 billion from Obama & soon to be nuked up) + Russia (mass murdering fascist state). Aside from the nukes, Iran & Russia controlling the middle east will be an economic attack on the US economy. We’ll pay for it big time.
So, what’s your plan? War with Russia?