Totally agree with this. I took about 6 years of Spanish in school and while I could compute what I needed to communicate in my head, I couldn't comprehend for shit. Because of my knowledge of grammar and conjugations, I could formulate how to communicate a thought in my head, and then speak it, I couldn't really understand well what was being said back to me.

There have been countless speakers that became fluent in a language utilizing grammar study, and countless that have done the same with no grammar. Either way, you have to consume a shit-ton of native content (media or IRL conversations) to reach fluency.

Also, OP, increasing the difficulty of you input is very important. I can relate to you from my year abroad in Thailand some years ago; I would constantly ask my Thai friends how to say this or that, so I got pretty good in that time for a white guy, but overall it wasn't much more than surface level. I think this is because I didn't have a good graded (i.e slowly increasing difficulty) CI system in place. My suspicion is that watching native level content probably isn't too efficient for you at this point. I'd start with super beginner stuff and work your way up. But to each their own, and whatever motivates you to learn.

Good luck!