To those that can see any glimmer of something different than hating and pitying themselves for being autistic, I would encourage you to have a little hope.
In your time of doubt, look to the people here on the forum who have made very good and decent lives for themselves. There are people right here among us who can say, “my life is pretty okay” and they do not dwell on misery. Does this mean that they have led easy lives? Oh no. It just means that they see the challenges before them as problems to solve and they know that life is tough for everyone, not just us. These are the forum folk who persevered through great hardship and did not get swallowed up by the notion that “life would be better if I was just someone wholly different than I am.”
Nobody in this life gets a free pass to feel happy and content all the time. We all must pass through difficult feelings. But focusing only on all the hurt allows us to forget about resilience, adaptability, and learning as we go.
Perhaps it will take leaning on some support, perhaps it will take an enormous change, but never give up on the notion that you can at the very least be at peace with yourself.