Well, the most boring, tedious, repetitive, brain-dead combat I've ever encountered in a videogame was in D:OS.
If that is the case, I would say it is derived more from the encounters being too easy. Trying it solo or in MP, it was not the case. But with full group by level 14 or so (on Tactician), on my first play through, combat was too easy. The combat in any game can be so described if it is easy enough.