Lungs burning on the last lap means your body still shows up when you call it.

Burning at the end of hard effort is not a malfunction. It is your body doing what it is built to do, on demand, because you asked it to. Bodies do not owe anybody a performance, and they vary wildly in what they can give on a given day. On the days yours answers the call, that is worth a second of respect even while it feels terrible.

After the next thing that leaves you wrecked, stand still for a moment before you complain. Notice your breathing coming back down. Then thank whatever you have got, at whatever level it worked today.