Most popular leagues are prone to having match fixing all the times and it's always hard to predict most of the outcomes at times, especially the English premier League, Spanish, German league and Italian league.

In lower league, the outcome always seems to go as predicted because bigger clubs wins the underdogs many times, I can say it's always less competitive, and a club that win trophy, like the league title 4-5 times every season.

You can't find that in popular leagues where one particular club wins the title race all the times, and so there's always lots of competition between clubs.

Likewise the results too in sport betting, the outcome on popular league games in popular league is harder to be predicted than those of the lower league games.