[apt-apt-apt-apt]

I tried posting my story-with-self-promotion (self-association indicated at the start of the content) to several subreddits.

Most explicitly outlawed self-promotion posts, so nothing even got submitted there. The few that didn't got instantly hidden by auto-moderators, pending review. Out of those few, my DMs and followups to mods to kindly consider my post got a vague 'no excessive self-promotion' message (to my only post) days later, then got ghosted after.

[dmasiii]

Try to analyze the most performing posts in certain subreddit and see the difference in writing and "self-promotion" that people do, you will understand many things I assure you.