It's negative because you want it to somehow be a positive experience just because you enjoyed it.
It's a constructive comment because hopefully seeing how your words fell on someone else (e.g. me, to whom that just sounds like animal abuse and a traffic jam) will help you. I don't want to take away your joy, but you shouldn't be trying to share it. It's animal abuse that you enjoyed.
Thank you for the response. You're right in that it's not a "positive" experience simply because I enjoyed it. It's difficult to put into words the wonderment of the experience while fairly acknowledging its harmfulness and cruelty.
It's a constructive comment because hopefully seeing how your words fell on someone else (e.g. me, to whom that just sounds like animal abuse and a traffic jam) will help you. I don't want to take away your joy, but you shouldn't be trying to share it. It's animal abuse that you enjoyed.