To be fair, there are a lot of situations where we have some hard time holding bitcoin and I had one of those years as well, but I got better by the end, and that is when things started to go up, so I am happy with it, but there were many moments when I could have held a lot more, and couldn't because of this issue.
It's fine to have an issue with your finances, we all do and that's normal, do not be sad that you missed out on this one, the bear market will return one day or another, and when it does, try to accumulate as much as you can during the next bear market so you can make more on the next bull run, you can always give it another shot next time. Remember, you can always make money in the crypto industry by working too, so if you have time, learn something that can benefit others too.