The video pretty much describes why Fandom is so bad and why many games are moving their wikis to alternative services, and why you should stop using it in general. Some examples include:

• Ads everywhere, including autoplaying video ads that play another ad when they're done. There are also ads sneakily inserted in the middle of articles that are related to the wiki, like a Gamespot review (Gamespot is owned by Fandom)

• A sidebar you can't remove that promotes their content

• Fandom hijacked the community's Mcdonald's wiki to turn it into a giant advertisement

• Accounts that are 4 days old can bypass restrictions and easily vandalize pages

• Fandom sometimes introduces things nobody wants, such as AI generated answers that are usually wrong, take up the top half of the page, and with no way for wiki admins to remove it. They removed it after a lot of backlash but still...

• When people fork their wikis to other sites, fandom refuses to let admins delete their old wikis. This makes new wikis difficult to start because Fandom usually ends up as the top result on search engines, even if they're old abandoned wikis.

The disinformation doesn't really matter. The fandom wiki's naturally become incorrect over time, since they're typically no longer maintained after a community switches, so vandalizing it after the fact won't really change anything. For Path of Exile, it took the developers linking to the new wiki, and about two years of the community sending new players to the correct wiki, before it even started to show up in searches. Even then, I believe the fandom wiki still shows up first if you look at some of the very old entries.

I've found the best way to browse Fandom(if necessary) is to use a VPN set to Nordic countries. Ads are very generic and in a language I can't read. So they are very easy to spot.