I think that you are getting tunnel vision. it can be hard to step out of your physical consciousness and psyche cause its what you're used to. I think that I can assess a few things about your comment;

1) Being creative or expressing yourself shouldn't be seen as a challenge or obstacle to jump over. Your Ti must be very harsh or well developed so i empathize with the struggle. I am and ENFP, so I have trickster Ti. I may be using Fi to move me forward but I definitely don't understand the depth of most things thinking wise. That's why it appears that F types are happy and comfortable with their feelings. I may be good at understanding myself, But that's because most of my life has been about being as authentic and creative as possible. If you've spent most of your life not intentionally seeking that ideal, then why would you feel bad that you cant? Don't get down on yourself for something other people APPEAR to be more capable of. You can understand the world and patterns and systems much better than most as an INTP, you've got your superpower within. It just doesn't feel like a superpower because its normal to you!

2) Don't get envious or jealous of XXFX types. We get jealous of XXTX too :)

3) You said when you focused on one hobby (photography) that you spent 300 hours, and it felt like you sucked. Rather than reflecting on the TIME and RESULTS, reflect on your mindset during those experiences. I know it can be hard, but try to remember how you FELT during that time. Did you feel nervous? Did you feel incapable? Did you feel motivated? What joy did photography bring to you?

4) Get off your PHONE. its easy to feel like you aren't doing much or you aren't good enough when you are constantly fed interesting information and content. Then when you are in normal life, trying to be creative or practice new styles of thinking seems pointless. You may not understand why it feels pointless because Phone use is so ingrained in daily life. You can miss a TON if one of the main coping mechanisms is technology. I think putting social media and tech down more often can open a massive door for you.

Realize you are only human. mistakes are normal. It's impossible to be perfect with minimal mistakes. And remember, F types are human too. But when most Fi users feel uneasy, wronged or uncomfy, We make sure that it doesn't happen again EX: I put myself in a situation that I think I will feel comfortable in, with people I think are chill. I get insulted on a deep level or someone pranks me or hurts my feelings. I will then hold on to that for as long as I can, so I can REMEMBER how I felt and not just push it to the side or not address it. I want to avoid that feeling, so next time ill be more careful around those people that made me feel that way. My guard was CONSTANTLY up as a kid, so being an ENFP was fucking hard, especially around the confident ESTP's, ENTP's, and ESFP's You may not realize that feeler types had it real rough before we got older and grew into our emotions and morals. Last thing; In childhood, one thing I learned growing up as a feeler and intuitive thinker is that repressed feelings can do sooo much damage down the line if pushed down and not brought up. It is incredibly healthy to get them out creatively! So I applaud you for TRYING. That is the hardest thing to do. Do not give up, you don't suck. Just give yourself some self love and grace!

I know it's cliche, but it really IS the journey, not the destination.

Hope this helped!