Canada

It’s literally in the title: “Assault charges dropped against Ontario man who confronted [emphasis mine] home intruder”

You're reading a LOT into a choice of wording in a headline there. We do not know anything about the circumstances of the "confrontation" in question. Nothing there indicates that he, for example, went out of his way to get into a fight when he didn't have to.

You’re forcing someone into making a split second decision at that point, and you can’t expect those decisions to always be the correct one, and I don’t think it is criminal to make what might be the wrong decision (or might be exactly the right decision) in such an extreme situation.

Correct. It is not, in fact, criminal to do that. Defendants are given significant leeway in self-defence claims precisely because the law does not expect people to make the right judgement call in a split second. If you responded to a seemingly legitimate threat in a moment of panic, that's still covered by self-defence. What's not covered is a) going out of your way to get into a fight, and b) using force that is clearly unnecessary or disproportional to the threat against you. Everything else is fair game.

Remember, the charges against this guy were dropped. Even though his assailant ended up on death's door, in an emergency room, covered in lacerations and bleeding to death, that was still considered fair and reasonable self-defence. You're panicking over nothing.