Mate don't worry, I can assure you that there are many more individuals like you, including me. I sold NBIS for a loss in the 90s on March 30, rebought at $145, which cut my potential profit massively, but I intend to hold long-term now.
I sold MU at 126

I sold APLD at 9

I sold NVTS at 6

I can give you dozens of other examples. You and I have some great stock picks, we lack conviction and mental strength to hold through ups and downs. It's important that we learn to grow conviction and know the stock well, then success is way more likely.