Sadly many reviewers are clueless about the actual criteria, clarifications, and guidelines. Much of the information only exists here on the forum, the Helpshift web site, or the Wayfarer web site. Virtually no criteria information is presented to a player when they make a nomination within the game. Many who review, likely do not bother to familiarize themselves with the criteria and guidelines available even when they do visit these sites. Or worse, are ignorant of the criteria knowing full well they are reviewing against it.
This is why a submitter should never consider what is in game as what is or is not eligible. Criteria has certainly changed over the years. Clarifications have come and gone. Nominations unfortunately get wrongly accepted. Not to mention there may have been additional context in the nomination that convinced reviewers something does meet criteria, but you wouldn’t know just from the way spot in the game. Even Niantic gets things wrong (far too often in my opinion).
S2 cells have no bearing on criteria. You are meant to nominate and review as if you do not know they exist. And should not be used to manipulate the game board to favor a player.
The Wayfarer site now has the ability to submit nominations. And through this form on the Wayfarer site, you are able to upload up to 5 (I think) supporting photos. This would be a much better way to include multiple supporting photos for any nomination that needs it. Though looking at your screenshots, keep in mind that if you are submitting in game where you are limited to only 1 supporting photo, that photo should include the object being nominated to provide context.
Unfortunately as @cyndiepooh stated, the player bench is not separately eligible from the existing soccer field.
This would be very akin to the clarification on playgrounds which state:
I would highly suggest you do not resubmit, or make any further nominations of player benches like this. Spamming ineligible nominations risks your account getting a punishment.