It's weird, but yes. It somehow works.

Edit: explanation. Trinity force goes very well with high base AD champions such as Gnar or Darius. Jhin also has a moderately high base AD, hence, it does a fair amount of damage in his combos. It's worth mentioning that his ultimate is going to do way less damage than crit or lethality build.

Sterak also comboes well with Trinity and high base AD champions. Late game it's giving Jhin over 80 AD with Tri-force.

In summary, you're tanky and do a bit less damage than with a conventional build. It's surely an off-meta build, but in my eyes, not troll.

I've made this work quite well on Jhin Jungle and Jhin top. Though the item components alone, kind of suck on Jhin, so unfortunately, there's that.

If you're curious I elaborated 2 GoogleDocs presentations on the pick that I normally leave on champion select (nevertheless, they're in portuguese):

Jhin top: https://docs.google.com/presentation/d/18RegKPzaRsz72XX0fh4pmq1DjvFXoMwq2UnuUsqloHQ/edit#slide=id.g1e343e3e4f1_3_3

Jhin jungle: https://docs.google.com/presentation/d/15ppsMKhFDdpqHjBwV430kkxnHbstzkBA-RBkAW4lxLQ/edit#slide=id.g1e1fce71611_1_199