Where's the sense in a soccer season made up of multiple World Champions? The team that wins that post-season FA Final has the same prestige as the regular season divisional group winners. It would make more sense if the winners of the 4 divisions were the post season playoffs. Then the fans might understand it.
I've no idea what you mean here.
you do seem confused.
"The World Champions", as such, are the (national) team which wins the FIFA World Cup. Currently Germany.
nobody else.
there are of course 'world champions' in other sports, including in football/soccer at
Club level, but those need always be qualified by defining adjective(s) (e.g. the FIFA Club World champions (club team), FIBA world champions (national team), Cycling road world champion (individual), and so on.
most certainly the winners of Britain's top league (the English Premier League, EPL) would never define themselves as 'world champions'. that would be utterly ridiculous.
Sticking to football/soccer, even the winners of the most important club trophy in he world, the UEFA Champions League (UCL), are just European Champions.
In most european countries, including England, there are two main tournament, a Championship and a Cup, typically the Championship is by far the most important one and identifies the national 'champions' the winners of the Cup are just that: cup's winners. Usually the championship has a 'regular season' structure, with no post season and no divisions. Everyone plays everyone else twice (formats vary in different countries) while the Cup has more of a knock-off format (again formats will vary from place to place).
Winning or placing well in these domestic tournament guarantees a berth in one of next years' european tournaments (UEFA Champions League, the Europa League) while placing at the bottom will relegate the team to a lower division (to be replaced by the winners of the lower division)
Thus, in England, the 'Champions' are the winners of the EPL, Leicester this year.
The structure of this tournament has no 'post season': whoever has the best record at the end of the season (equivalent to the regular season in american sports) are the Champions.
Then, teams ALSO vie for honors in additional tournaments like the FA Cup and others of varying importance. in addition, some teams will also participate -if they qualified- in continental competitions, like the aforementioned Champions League, the Europa League, and so on.
so a good team might compete for multiple trophies: the national championship, the national cup, the european championship, the club world championship and others.
very rarely the same team can claim all these trophies at the same time: only 7 teams ever won the european "treble" (national title, national cup, european championship): Celtics, Ajax, PSV, ManU, Barcelona (2x), Inter, Bayern. Of these, only 5 went on to win also the club world championship: Ajax 71-72, Manchester United 98-99, Barcelona 08-09 + 14-15, Inter Milan 09-10, Bayern Munich 12-13