Great post. This is exactly how I feel after investing time, resources, and effort to help Steem with POW and getting no reward.
It's probably easier and more profitable to just post pictures of cats... or whatever, than burning your CPU's, electricity, and bandwidth on futile mining efforts that never get their due rewards.
I think there should be a code change to prevent GPU mining from happening.
If this issue is not addressed, GPU mining will take over and it will be managed in a centralized way by a few.
Mining centralization is not the original idea behind Steem
Steem developers: Please fix the code to prevent GPU mining from happening!