Most definitely in terms of the 'Public Health' impact that this regime has had, it will be considered ONE of the biggest humanitarian crisis of all time, especially since the end is nowhere in sight.

More than one third of the pop. is internally displaced with nowhere to go, nearly 14 million are in need of humanitarian and protection assistance, and more than 80% of the pop. is without access to clean water... this is far from what the entirety of this regime has inflicted on the people of Syria, but I think you see my point here.

The crisis may shed a layer of 'civil war' but this is really a war on the people of Syria, carried out by the Assad regime and his allies, like you mention, so can it really be considered a 'Civil War' as you say??