We are replacing brutal dictators with even more brutal Islamists. It's messed up how non-Muslims seemed better off with these secular dictators in power than they are now. If they were able to produce legit security for non-Muslims under the Caliphate, I think it would be more accepted. But ISIS has a very different view of the Caliphate than what I think was intended by the faith. Mission accomplished ! AMIRITE ?!
You asked if WE were better off and we are. The longer a brutal regime stays in power the more organized they become and the more power they have which ultimately makes it harder for the US to have an influence over them. With regime change comes chaos while they organize and that benefits us immensely because it is easier for us to work those regions towards our favor. What they do with their own people is not included in your question so it is not relevant to my answer. So for us, yes, it is better if these nations and regions stay in a state of flux, constantly at odds with each other.