Whilst I can't diagnose your specific malady through an anonymous forum, I can give you this general advice:
1. You should be drawing more than you are reading.
You will naturally do this in most-all cases but… just to be sure.
2. You have not fully grasped a drawing concept until you have applied it in your work.>To taste the pear, you must change it by eating it.
3. Try and copy/trace/whatever, pieces and photos which look good to you.
Don't be afraid of those snotty academics concerned with plagiarism, that's fancy speak for copyright; owning an idea (and fuck that).
4. Have drive to draw.
This is where I fucked up the most in my artistic career. For the majority of my time I thought I was worthless because I couldn't draw as well as 'others' (Japanese professionals who are worked to death while alienated from their labor by someone fatcat).
I can't tell you what did it specifically, but at some point I snapped and dumped this cycle of shame which has enabled me to draw silly kinds of stuff like the image attached.
Hopefully you can also find your drive in producing agitprop for the cause, I certainly did.
If you want more clarification or have more questions, please do reply!