How close is Isis to losing the war?

After the recent battles in Syria and Iraq, how close is Isis to losing the war? | Voices | The Independent: 
The purpose of the Syrian government’s air and artillery attacks has remained the same over the last five years and is to separate opposition fighters from the civilian population. “This is the same classic counter-insurgency strategy that was used by the French in Algeria and the US in Vietnam,” says Fabrice Balanche, an expert on Syria at the Washington Institute for Near East Policy. Syrian government forces target rebel-held zones and essential infrastructure such as hospitals and markets so whole districts of cities like Damascus and Homs are reduced to rubble.