[...], I am so sorry you are struggling but I can relate because insomnia was hands down my worst symptom. I had relied heavily of clonazepam for sleep for many years so it should not have been a surprised that by the time I finished tapering, I had a terrible time with sleep. You are so right, those long nights are very lonely and depressing. Ultimately I got into a rhythm where I slept very little one night and then the next night I slept well because I was utterly exhausted.
I went on the faith in what others here said - that this gets better with time and it eventually did for me as well. At about a year off clonazepam I began to sleep fine with the occasional restless night but nothing like it had been.