All those constant stops and standing around, especially in American Football, are extremely interrupting and confusing.
It's like, run for a few seconds, then everyone kind of mills around for a while, eventually gets back into a line, and eventually a whistle blows and people start moving again.
I know you probably won't, but you should give american football a chance. There are really 4 entities in American football playing against each other - each team, and the game clock, and an independent play clock, which is really it's own thing. The game clock acting as a neutral force in the game dramatically dictates the strategy of the game.
People aren't milling about in between plays, and the time spent between plays is important. The time spent between plays is when coaches call in the plays to their players and, much more importantly, when substitutions are made by each team. The offense essentially defines how fast the game moves between plays - if the offense elects a hurry up offense (essentially no down time between plays) the defense has no choice but to go along with it
unless the offense substitutes a player, in which case the defense must be allowed time to substitute a player.
Each offense has a maximum of 30 seconds (25 in the pros, I believe) between plays according to the play clock. If you are, for example, decimating a defense with your current lineup, you would go no huddle hurry up to pummel the defense.
There is a lot of nuance in the ways you milk a clock in football, I find the clock rules makes the game much more exciting. In reality, the clock rules for football mimic speed chess in several ways.
There are numerous ways for each team to affect each clock individually, and sometimes "standing around" in and of itself is a strategy. Milking a clock late, on 4th down, your offense goes to the line and imitates cadence for a full 30 seconds to try and draw the defense offsides, for example. The defense knows either it's a fake, or that they're coming on all cylinders. Either the offense is going to play off the defense trying to time a blitz for maximum efficiency for a, say, a game-winning first down, or they're going to call a time out with 1 second left if the ploy doesn't work.
Individual plays affect the clock too. If the game clock is winding down, and you have to march down the field for a win, you'll go to passing plays as incompletions stop the game clock. That sort of stuff. The dual clocks of football, coupled with the ways the offense can affect the clock, pretty much makes it unlike any other sport I've played or witnessed. Even basketball is different because the offense really only has a few ways to affect the clock.