The opening line to Leo Tolstoy’s Anna Karenina is “all happy families are alike; each unhappy family is unhappy in its own way”.
That particular wording applies to couples and families. But the main idea can easily be applied to individuals: “All happy people are alike; each unhappy person is unhappy in their own way.”
The reasons that have brought you to the point of saying “I hate my life” are entirely your own and unique to you.
On the positive side: whatever troubles haunt you are not permanent, unless you want them to be. If life has ups and downs, you’re now in a down period.