This and the OG movie aren't even comparable because they share nothing in common besides being about the turtles, THATS IT.
Never mind the cgi vs suits or whatever, let's just talk story.
OG story was silly but it was still to the point and connected the foot with the turtles in a way that gave each party a motive. Splinters master was killed by shredder. Freak accident makes turtles. Foot clan captures splinter. Turtles go to get splinter.
In this movie the shedder is trying to help the scientist make money? The scientist was raised by shredder? Scientist is Aprils dads friend? Splinter has no connection to shredder? April sneaks into super secret lab facility and feeds the super secret experiments pizza? They found the turtles so let's release a gas into the air that we've never used for 15 years in a machine that just happens to be there for 15 years?
I mean come on
Again with all that said its worth the watch just to see the turtles on the screen. The scenes with only Megan fox as the focus were brutal though