The premise makes no sense

I started thinking about how OTHER people see all this. I mean, let's say Phil goes on a rampage and murders 100 people. Then he wakes up and the day has reset, so no one is dead now.

However, how does the 'killed individual' experience it? I mean, someone DIED, and now they're ALIVE again? How does that kind of reset work, exactly?

The day can't just reset for HIM, he needs everyone to be reset as well - is it global, does the whole world reset? I mean, where does all this 'resetting energy' come from, because it's a MASSIVE amount that's required for that.

Let's say Phil drives with the drunk guys off the cliff and they all die. Phil resets, but how does the 'died drunkard' experience it? Does he get reset, too? I mean, obviously, he HAS to, because otherwise, he would be missing from Phil's day, right? But he died, does he have that memory or not?

Let's say the other people do not get 'reset', they just experience it as a normal day and wake up the next morning. WHICH one of the zillions of different 'Phil's Groundhog Day Specials' did they experience yesterday? I mean, did they experience the one where they died, and now are resurrected? Did they experience the first day where Phil was all grumpy and walked into the wet pothole? What is those guys' memory of the groundhog day?

I mean, the groundhog day happened - not only for Phil, but others, too, for zillion times - if it was just Phil, there couldn't be all these different events, happenings, reactions and so on. Ned had multiple different talks with Phil, so how does Ned remember the groundhog day, WHICH ONE of those scenarios does he remember, or does he remember all of them?

How is this 'day reset for Phil' possible without resetting EVERYONE ELSE's day as well? Everyone that Phil interacts with, has as many different groundhog days as Phil, because they did, from Phil's perspective, experience the day differently each time with Phil. How does that work, and again, WHICH one of those would they remember the next day? How does Phil know there IS a tomorrow for everyone else, and why is everyone else oblivious to the day reset, when it obviously happened to them, too?

This kind of concept always seems so easy and simple until you start thinking about the details like these. If Phil is the only one experiencing the same day over and over (in which case, he shouldn't have the freedom to CHANGE the day, because it already happened a certain way, so it should always happen the same way, otherwise, it's either not the same day, or everyone else is reset, too).

I mean, if it's just for HIM, then how can EVERYONE ELSE change what they did that day ad nauseum? Everyone Phil interacts with, has multiple different dialogues and activities that would, due to butterfly effect, create a completely different day for them in the end, lead them to have different ideas than they originally did, and so on.

Also, if the whole world keeps resetting, it would require a ridiculous amount of energy, and since this is not time travel, how would that even work, where would that massive amount of energy come from, and wouldn't it be more beneficial to use it for something OTHER than making some guy successfully woo some hag? I mean, there are wars, drone murders, people die of starvation, kids die in factories trying to make fireworks for wealthy countries and on the streets because they sniffed too much glue.

This movie's premise is that the Universe doesn't care about any of THAT as much as whether Phil gets to pork a specific female.

As I mentioned, this premise makes no sense, no matter how you look at it.