It would be careless if he would have stepped on a player that he didn't know was there and didn't look for. But he did know that this player was there because he reacted to that with exactly this movement that resulted in the foul.
He way going for (a block of) the player, not the ball, so that's irrelevant.
He knew the player was coming, it's a coming together, not reckless or use of excessive force.
Both are highlighted below.
It's at most a yellow card.
If it wasn't excessive force, why did the ankle bend like this and almost gave in?
And of course I wouldn't be happy as you'll never be happy when you get sent off. But after seeing the images, I'd accept it is justified. Self reflection is key. I'm sorry but look how he hits him. That's not excusable by "ooops, didn't see ya". I don't know if you've ever suffered a serious injury but I broke my collarbone, broke my wirsts, ruptured my external ligaments and my ACL all thanks to being fouled playing football. Maybe that gives you a different perspective on what's reckless and/or excessive force.
Because an 80kg man accidentally put his full weight on it.
I can see why you think that way seeing as it sounds like you're made of match sticks and tape. And must have always come out the worst.
I've played football my whole life, both GAA and soccer. Taken and dished out many hits along the way and even got my fair share of red cards. But, aside from being knocked out, I've never sustained any serious injury from a tackle in either sport. I've been stood on like that loads of times, I would always accept it as an accident and move on. Even if I didn't get a freekick.
“Careless” means that a player has shown a lack of attention or consideration when making a challenge or that he acted without precaution. (No further disciplinary sanction is needed if a foul is considered to be careless)
“Reckless” means that the player has acted with complete disregard to the danger to, or consequences for, his opponent. (A player who plays in a reckless manner must be cautioned)
“Using excessive force” means that the player has far exceeded the necessary use of force and is in danger of injuring his opponent. (A player who uses excessive force must be sent off)