None of these games are even remotely close to the most complex board games.
The campaign for North Africa is by far the most complex game, being as it was created specifically for that purpose and nobody has ever managed to even complete a singlr game of it.
Behind that are dozens and dozens of games in the 18xx genre, which is a giant cluster of rules from bespoke stock market operation details to complex route profit calculations to natural disasters and a million other things. Games can often take 8+ hours.
After that you have the entire hex and chit wargame genre, which will have tons of complex rules for combat, tables for looking up results, a million classes of units, and usually many rules that are included not even for game design purposes, but just for historical accuracy.
This is an awful click bait article just designed to get views for a more casual audience with popular well known games.