He was talking about you though Joshy, not the MC.
You yourself have admitted you like when a girl dominates you (and you're not a fan of the opposite), which means your more submissive, and you like to watch more than you like to participate from what I've seen on here. These things combined definitely put you into the cuck category of the swinging world, that said, there's nothing wrong with that.
The MC on the other hand, in general isn't really a cuck, he can come off more as a cuck to an extent, depending on your choices. Though in general, especially on Ann's corruption path, the MC is definitely more on the dominant side.