Is anyone else struggling with an underperformer in their portfolio?

I’ve been watching this one stock that I thought had huge potential, but it’s just been lagging behind. I did all the research, read up on the fundamentals, and even followed some of the big analysts, but it feels like I’m just throwing money into a black hole at this point. It’s frustrating because I really believed in this one!

Have you guys ever dealt with an underperformer like this? Do you stick it out hoping for a turnaround, or do you cut your losses and move on? I’m torn because part of me wants to hold for the long run, but the other part is like, “What am I doing?” Would love to hear any similar experiences or advice!