Famously, Kant stripped away all his preconceptions and could prove only the subjective (I think therefore I am), whereas you seem to deny everyone their subjectivity, even your own. In any case since you’re interested in these questions, I assume then you’ll reach a better understanding of these questions, just keep studying and growing on your own terms (which is contradictory to your own thesis, but the whole is always defined by contradiction.)
The last thing I will do is deny anyone else’s experience but it sounds like you want to do that, all the while unaware of where that impulse originates. As if it percolated up into consciousness completely unbidden or did you will it into existence?
But what is experience, how can you find experience without a self doing the experiencing? I’m not trying to put it on you but it is consistent with your logic, as I understand it
The self is synonymous with experience. It’s why the self is simultaneously a substantial entity and completely without substance. We remember what it felt like to be ten years old and yet every single cell that generated that sensation has long since been replaced by adulthood. People who receive traumatic brain injuries can become strangers to their family and even themselves. The self is a contrivance and an emergent property of a neural network. Ever changing, elusive and yet reassuringly familiar.