Mate, not going to do the circle on this, but lets be clear
- There is a reason derbies are harder games than regular matches, at this level, the margins are small, the players being that much more "up for it" makes a difference. See fudging West Ham playing us every fudging season. It also works in reverse
- Leicester's season was a fluke, because they had very little injuries, a WC acquisition (Kante) and half the team played the season of their careers, you had a team challenging with no European distraction (makes a difference, see Chelsea) while no one else in the league saw them as rivals (you had fudging managers pre their games with Leicester actually saying they would like Leicester to win the league). While I'm not suggesting people threw games, they certainly didn't treat it as derby/rival type games and that benefitted Leicester enough to make it work.
It is a fluke, never repeated, Leicester won't even get back into Europe and I give them 5 years before they drop out PL, fudging Trivia question for future generations.
Like so many people, you fail to understand circumstance (luck for want of a better word) plays a part in any success, luck of draw in knockout competition, opposition form/injuries just when you play them, someone winning the CL the year you finish 4th and they finish 6th. Leicester got a lifetime of circumstance in one season, hence its a fluke. Could we have done better? = sure, but people have actually run computer analysis on that season, in very few runs/reruns does Leicester actually win.