How is this inaccurate or offensive?

I have had six nominations rejected now for various spurious reasons. None of them violate any rules of the game. This one is the most ridiculous of all. We are in a small village that desperately needs more Pokestops if we are to get any kind of community going.
Comments
While I cannot speak for those reviewers (nor did I review this particular submission), I notice it includes the word “waypoint” in both the title and the submission.
Though the term waypoint predates Pokémon Go, Ingress, and Niantic as a whole, I vaguely remember reading a post on these community forums discussing the usage of the term in in-game titles and descriptions. If I’m remembering correctly, I think several users stated they would reject those proposals for featuring game-specific terminology. Naturally, I cannot find a link to this post.
That may be why some reviewers tagged it as “inaccurate or offensive,” and may have preferred a term like “trail marker,” “marker,” “navigational sign” or “sign.”
That’s just speculation on much end, and it’s a bit inside baseball.
The rejection reasons are bugged since the update to Wayfarer. Nearly everything that's showing a rejection reason is showing inaccurate title or description. You should ignore that typically.
Personally I would've given it a name along the lines of "NCN Route 4 - White Hart" and a description of "Trail marker for National Cycle Network Route 4, a 433 mile long cycling trail between Fishguard and London." with another sentence after that explaining what sights or interesting things happen on that section of the trail, or nearby places of interest you can stop to visit.
In the supporting info you should also include a link to the sustrans page for the route (which is below), as whilst NCN markers should be acceptable, a lot of people don't realise these are actually valid trail markers at first glance.
https://www.sustrans.org.uk/find-a-route-on-the-national-cycle-network/route-4