Inconvenient truth about Syria

I was listening to the news this AM- that oil wells owned? Commandeered? by rebels ? ISIS have been targeted by US? ?missiles? I thought we were lead to believe (by mainstream news) that the fighting in Syria was supposed to be sort of good guys against the “tyrannical” Assad regime. Yet now we have another band of bad guys in there as well.? Meanwhile what are Assad forces doing re the pipelines ? oil wells i.e. to protect them ? Others must be as confused as I am surely??