Is the ending all that happy?(spoilers)

So we all know that Hulk snapped back all the people that Thanos snapped away, but it has been five years, and while the world didn't move along happily, it did move. Resource wise, the world has probably adjusted to having 4 billion people, so instantly doubling that won't be a smooth transition.

I'm also curious how many people came back to find that their spouse has grieved and since remarried?
How many parents were disappeared and found that their toddler is now an eight year old who isn't too hyped to leave the only parents they know to live with strangers? Or even worse, how many parents came back to find that their kid starved because they were left alone in a locked house due to Thanos' random draw?

Also, judging from Peter saying he woke up on the same planet they fought on, I'm assuming that people reappeared at the same spot they left from. Which means millions just popped up in the middle of freeways and some definitely got splattered by shocked drivers. Or the poor bastards who were flying five years ago, and now are just free falling at 30 thousand feet.

I'm sure it would be happy for many, but also chaos and sadness for others.