I think a better example would be watching something like Pineapple Express or Harold and Kumar go to White Castle and complaining because all the humor was stoner jokes. It's kind of the point of those films to be stoner comedy, kill la kill and gurren lagann are meant to be incredibly high speed hot blooded action.
For the purposes of Toonami if you do not like Kill La Kill, you are not going to like FLCL, which is very much in the same style.