I don’t mean to sound overly critical, but the point of a logline is to entice a producer or funding body to want to produce your script, and then for them to be able to sell it to talent and distribution companies.
Your current logline is far too vague for that to work. None of the important questions (the ones I asked above) are answered.

Even your description is too vague. It tells me, essentially, that your hero is an everyman who is alive, just living his life, and that when he dies, he’s dead. He is his own enemy. If he fails to die he will live again.

Apart from pushing the envelope of mundanity within film … why would anyone want to make or watch this film?

Bear in mind I’m not criticising the idea – you may well have a corker. I’m criticising your logline. You’re doing nothing to entice the reader to want to know more. Give us something.