How to compare an IGH (Shimano Alfine 11) with a 10 speed cassette and 3x chainwheel?
I think you’ve told it to do an Alfine hub with all 3 chainrings and all 10 cassette sprockets, so the computer is obliging. 

Just include one chainring and one sprocket value to get the Alfine table. 

Then calculate another table with all 3chainrings and 10 sprockets but no Alfine 

You’ll get things more like this:



You’ll need to pick your own chainring and sprocket values for the Alfine, point being you can customise these to get the gearing you want. I put in random values (32,17) which give the Alfine something like the range of the 3x10 setup

Edit: a gain ratio of 1.9 may/will feel nothing like a gain ratio of 1.2 when you're climbing, so keep playing around with numbers for the IGH chainwheel and sprocket