Well this assertion is just that, an assertion. I don't think reality proved anything. People still use Bitcoin in everyday transactions, the network fees started to drop, the congestion is gone, Lightning network is just around the corner. So it seems nothing was proven beyond any doubt. It's just a rant from your part.

Of course you are free to believe that Bitcoin will not succeed and will somehow be dumped as a currency in favor of something better. But that is just an entrepreneurial bet on your behalf, just as those who believe in Bitcoin bet that it will become money (universally accepted means of payment). So until the price of it drops to 0 or close to it, I don't think anything was proven yet.

The night is still young