The problem is whale curation bots.

My guess is that the vast majority of the voters on this post are bots. Since you've had succesful posts in the pasts, the bots are recognizing that and upvoting.

I'm not sure how the problem is solved. It may be that the whale curation bots are turned off if it degrades the platform enough. It also might be that the curation bots get smart enough to recognize the truly great content on here.