It sounds like the song writers came up with one good hook, the "aye got better things to do with my time" part and then didn't know what to do with the rest of the song, so they just repeated that part a lot and filled the rest with filler.
Also like every Eng release by a kpop group, some of the lyrics are stilted and awkward to a native speaker (me). However the song isn't all that bad, I was expecting 2017 tropical house EDM chorus and this was--thank God--not that.