From a very quick glance over the customization policy, it looks like the wiki follows it. However, if it's hard to use, you should share that feedback with the wiki's admins.

Also there are two duplicate wikis.. This wiki was created on May 29, 2024 and the original was created on April 11, 2024 (according to the history edit of the main page)

This wiki has more pages and more information BUT the original wiki is still active and still being edited and the problem is it is constantly vandalized due to the bureaucrat not being active anymore.

But would this wiki be counted as a duplicate? Because duplicate are not allowed and the original wiki came first.

Shouldn't have they adopted it? And why didn't fandom detect duplicate wiki when it was being created?

Yes, it's a duplicate; however, the system used to detect duplicate wikis doesn't catch all cases (which is why users should report them when found). In this case, the duplicate wiki should be kept and the original be closed/redirected to the duplicate.

I would suggest reporting (support.fandom.com/hc/requests/new) this wiki as the majority of the content on it is one-sentence pages.

The bigger wiki has broken the Collapse/Expand layout button (top left). This was done so they can fit that extra floating menu on the left side, but in principle, breaking the Collapse/Expand button goes against the customization police, because it's a basic interface element on FandomDesktop: it's part of its fluid width. Users should have the option to view articles on a wider or narrower layout, according to the size of their screens and their reading preferences. Forcing a fixed article width thinking that would to fit well to all devices and users is either a selfish or clueless decision.