There's clearly a communications problem going on here.
The first post made by @livingpharaoh was actually in a different Opera sub-forum (Opera for Computers): https://forums.opera.com/post/164596 . In that post, he specifically stated he'd just installed Opera 58, was looking for "Themes" options, and got entangled while searching in Opera's website by a referral to "Tools" for the Themes option. He then asked if that website description was out of date. @Leo responded "yes, it is". Unfortunately, that accurate moderator reply didn't address the OPs' underlying concern of where might Themes be found in Opera 58 (actually, such as it exists, under Settings > Wallpapers and/or Appearance). However, the reply did answer the OP's specific question.
The OP then posted here in the "Forums" sub-forum with a sarcastic-toned complaint towards Opera's support, regarding what he deemed the insufficiency of the reply to his original post in the Opera-for-computers forum. Subsequently (and unfortunately), it seems everyone thereafter has been essentially talking past each other here.
Several observations occur to me:
- The Opera websites indeed can too easily lead a user (especially one new to chromium-based Opera) down some confusing rabbit holes related to Olde Opera terminology and documentation which don't apply to New Opera. This is not the first instance of this in user posts I've seen.
- Sometimes the most relevant, underlying nature of a problem post gets missed by a reply. I too am guilty of this at times, occasionally because of misleading language/wording/interpretation and other times by a particular mindset I may bring to my first reading of the problem post.
- Sometimes, after a single problem post that doesn't get a (to them) 'suitable' reply, posters lose patience (and their tempers) and generate a 'snarky' post. What results thereafter is often a flame war that pulls in other attackers/defenders and alienates all involved.
I believe what's needed is patience on the part of each of us, original posters and responders alike, along with a willingness to calmly ask for and respond with more information and/or clarity when requested.