This entire comment spoke VOLUMES to my soul in such a deep level i can't even describe. But when you said "We tend to give ourselves imaginary deadlines hence demotivates us from pursuing, say for example, a guitar solo", that is exactly my thought process every time I pick up the guitar. It's deadlines. End game. Etc...Expectations, my friend.
Among the more hidden & dangerous, yet subconscious mistakes we tend to make is having expectations overwhelm us without us knowing.
I've watched countless interviews of ZV saying that he had to force himself to learn arpeggios to play those harmonizing parts with @Syn Gates , although ZV was more comfortable playing punk and rhythm, palm-muting, down-picking riffs. Does it make him a better guitar player? Certainly does. Could he have chosen not to learn those parts? He could, but he knew what he needed to do for the band. Else, Johnny would've taken that role despite lacking 2 strings. (also, ZV has one of the cleanest picking next to Syn)
My humble advice would be to drop the expectations at the time you are practicing and close the 'comparison door'. Why? Because practice is for you and you only. We tend to give ourselves imaginary deadlines hence demotivates us from pursuing, say for example, a guitar solo. We have that voice telling us that we need to master a solo in 2 weeks, for example, but in actual fact, nobody is expecting or telling you to master that in that timespan. Nobody is telling you what should or should be or what is right or wrong in your guitar journey.
Another thing would be the 'label'. Don't worry about not being able to 'play lead' for now. Take a break, move on to something else. The world of music is not limited to what you see and hear yourself being in. It's vast, it's beautiful. You'll probably be able to play lead one day again when your hands are warmed up from all the other things you've played and learned. Trust me.
You don't just learn how to run by working your legs. Your upper body plays just as an important role. Metaphorically speaking.
We've all been there, syster. You've been doing well and you'll only get better
Your words were amazing and beyond inspiring. Thank you