In the future, for your own reference, pace yourself.

Take a few hours between each post.

Custom write each post message for the specific board you are writing for.

Make them each an opportunity to interact with the people you want to interact with.

Failing to do those things comes across as unprofessional.

When a random passerby who is not a part of any of these magazines sees the constant repost of the exact same thing in seven different places, their initial reaction is going to be somewhat hostile.

Look at your ratio of upvotes to downvotes. That should be the information you can systematically programmatically detect as a response to your activity.

As of right now, it's averaging two to three down votes for every one up vote, and at least one of those upvotes is the automatic upvote you get for posting in the first place.

When a minimum of 50% of the community you are interacting with is against what you have done, that should be a clear indicator that you have erred in judgment and need to not repeat this mistake in the future.