You don't need more information. You need better training.
You spend a lot of time on chess. But then you sit down to play. You feel stressed. Your opponent doesn't play the lines you studied. And then you make mistakes you would never make in training.
The problem is that you're amassing knowledge but lacking skills. You don't struggle because you don't know enough. You struggle because your training doesn't build the skills you need in a real game. Finding tactics under pressure. Making decisions when you can't calculate everything. Staying focused for an entire game. These require a different kind of training than what most courses offer.
But instead of fixing that, you're stuck in a different trap. There are hundreds of courses, thousands of videos, and conflicting advice everywhere. You have limited time, maybe an hour a day, and it feels like there are a hundred things you should be working on. So you spend more time trying to figure out what to train than actually training. You buy courses you never finish. You jump between methods. You feel busy, but nothing changes.
What you need is not more material. It's less. A clear plan. Focused on the 5% that actually drives real improvement.