Hey, writer of BL+ here. I thought I'd reply with my own account since I'll be mostly speaking from my own experience.
I might be kind of in the same boat as you in terms of 2D art. I enjoy it but only draw occasionally since I quickly get demotivated again. That's probably partly because I want to improve and have high standards but they aren't really realistic considering how little I draw.
I think having high standards and being ambitious is theoretically a good thing but in my experience it can also make you feel pressured to improve quicker than you actually can. But of course it's difficult stay patient when you're not improving as quickly as you want to.
Something else I realized is that great technical skill or being good in all aspects of art isn't necessarily necessary for good art. Take ONE for example: his art-style and linework maybe aren't the most elaborate but when it comes down to it, the atmosphere and composition usually still pull you in. Of course that only works because he's making comics where there are more aspects to it than just the art but I think it's worth thinking about what aspects you are good at and if you can somehow make that the foundation of your art.
If you want to make comics or visual novels it might also help you to look into paneling, cinematography, or narrative techniques and how you can use them in combination with your art skills.
For example, if I were to make a visual novel on my own I would probably use a fairly minimalistic art-style where I can make use of my knowledge of graphic design and composition and try to carry the rest with story, writing, or sound.
I don't know how interested you are in things other than visual art but at least for me it usually helped to learn about other disciplines when I felt demotivated in one.
Anyway, I probably know too little about your situation to really give good advice but maybe some of it was still helpful...
Also I'm glad you like the pacing! I sometimes feel like parts of it are still a bit slow but it's good to hear otherwise ^^