Not really! But it's not actually so desperately complex. Basically, Net Run Rate = average runs per over for minus average runs per over against. Ireland's is currently +0.274, which isn't great.
If Ireland do qualify for the Super Eights (assuming they don't beat the WIndies in doing so) they'll be at something of a disadvantage in that only points scored against other qualifiers are carried forward. Pakistan are out and Zimbabwe are unlikely to advance.