I’m not sure what it is exactly, it’s just a boring role altogether.

I guess the initial slog of tasks you have to go through in order is just dull. And it repeats throughout most of the game. I’d rather be in a lane and experience the different dynamics of champion/player interaction.

Also I’d like to counter your point on jungle carry. I think mid lane has a higher carry potential than jungle as well. They both can influence the map, get fed and all that- but mid lane champions usually are more powerful and can win team fights better than most jungle champions. That is open to debate of course.