Hi! I just got accepted to a top tier program so I think I can now say, with confidence, that (at least for me) my premed process worked out. But I don't think your experience is entirely uncommon. Personally, the experience that stands out to me is the end of my sophomore year, because when I got my grades back I felt defeated. I'd averaged a 3.5 my first semester of sophomore year and was just bummed bc that wasn't good enough, so I'd spent all of spring semester working hard and I thought I was going for at least a 3.75 but I ended up w another 3.5. That was a hard moment for me, because I felt like I'd poured everything I had into that semester at the expense of my own emotional wellbeing and it hadn't been good enough, so I didn't know where to go.
This is where I think I'm going to sound corny but I honestly think sometimes you need to prioritize your own needs and figure out what you really want. After that feeling of failure, I took a step back and let myself think about what I needed, not what my classes need from me. I think it was because of that moment that I learned how to be a good student without feeling like I was losing myself, and I think that's kinda the key. The next semester my GPA went up to like a 3.75 I think, and then the rest of college after that I averaged like a 3.9/4.0, which is kind of a surprising GPA trend bc that's when I took all my 300/400 level classes. I honestly don't think I saw that growth by running myself into the ground. I saw it because I actually stopped to take inventory of the ways I needed to grow, and realized many of them weren't classroom based.
Figure out what you need, and who in your life you have to support you (for me it's my current partner who I actually met literally the day after I got those sophomore year grades and he's been instrumental for helping me take care of myself and not get lost in the hard times.) I also think if you're an undergrad right now, figure out whether dealing with the hard times and the bureaucracy is worth it for you. I think for all of us who stick with it, it's because we've discovered a deep rooted drive that (at least for myself) means that when I see my life in 20 years I can't see myself being happy doing anything other than medicine, and that keeps me going when things are hard.
This ended up being a long post, but good luck! I hope any some of that resonated with your journey, and I hope you find things and people that make it feel worth pushing through the premed process!