Ethereum and Cardano , the #2 and #4 coins on CMK would disagree with you.
You clearly don't understand anything and farting about centralized altcoins that run mostly run on vps servers and have blockchain size that can't fit on normal hard drives in not decentralization or security.
OP, plus Bitcoin mining is also a Sybil Attack prevention mechanism, and the incentive-structure works, the Game Theory works, and the network will chug along for many many years. Why change something that already works?
Change is needed sometimes and anything that is stagnant and not improving can be overtaken, so I would not be surprised if we see some future change in Bitcoin PoW or some better model, but it is certainly not going to be some shitty Proof-of-Stake.