Is there an idiom in English that relays that an action is too easy in a negative light? Like, it is so easy that it is boring/uninteresting/not worth one's time to do it?
I feel like I have seen one before but I can't remember or find it by searching. Common phrases for too easy are "piece of cake" and "walk in the park" which I have only seen in positive or at least neutral contexts. "Rowing with the current" somewhat fits in with the idea but it's not exactly a dictionary-listed phrase, and not always used negatively either.