I'm finding that winning the championships in FIFA2000 on World Class level is not that hard. SO...
To continue to enjoy this game in a different way, since we can't play as all the teams as in past versions, I suggest playing a season as one of the better teams... and then instead of playing the matches AS that team, play as the team against them and try to get them relegated.

Just an idea.

not a bad Idea, I have an Idea for all who think they have mastered the game (I am far from this)

this is what you do, take one team, any team, and put every attribute on every player to 1, and then play all the big teams with that, if something like a Fed 2000 comes out, then you can create the ultimate challenge by taking a team different than the one you set all the players to 1 to and set all the attributes to 7 to every player, this team will be your opponent. If you win that then you have 2 options:

sell the game or burn it