Rip-off is the wrong word, a mixed low-mid Y-J award. You're entitled to, for 120K, travel entirely in business class from your origin to your destination and back, so long as you find availability in Low or on a partner airline. From the chart it looks like you have:

One way all economy in Mid (65K) +
One way Business in Low (60K)

If you were to find an all-business routing (or at least mostly business) in Low, you could actually save 5K miles and have a very pleasant flight. Ripoff is the wrong word, what you're being hit with is Delta's totally broken award site (i.e. not showing partners on travel to Asia) combined with their total lack of desire to release Low level award space on their own metal.

If you provide me dates I can take a look for you, and maybe provide some guidance on how to book (it's not easy because the agents are less than awesome most of the time).

Feel free to PM me with your dates of travel! I just want to see you get the most for your miles

FWIW: All Business is 120K round trip in Low or on partners. All economy is 80K round trip in Low or on partners. For a 50% increase in miles (which you've already paid mind you) then I would do my damnedest to sit at the front (well, middle ) of the bus!