I dunno where to start because Destor pretty much nailed it.
Reiko looked straight out of Annihilation. The bad guys (outside of SZ & Kano) might as well of been generic TMNT foot clan soldiers.
They literally ruined Goru
Nitara was def wasted and it seems like they only chose her because she has wings and could swoop down straight into that sweet fatality
Raiden was laughable as Earth Realm's protector....some fucking temple.
The biggest let down was how they talked this up as some of the best on screen martial arts...pff. So many camera cut aways.
It's no surprise Ed Boon has not ONCE commented on the movie yet
Scorpion/Sub-Zero scenes were ace, tho.