That implies cryptocurrencies provide no value by themselves and is simply false. Ethereum is essentially a distributed virtual machine that anyone can pay to use. Monero offers complete financial privacy.
...that is unbelievably slow, limited, difficult to use, and makes it impossible to fix bugs.
It's absolutely fascinating in principle, yes. But in practice it's a solution in search of a problem.
I don't dispute that. The real innovation lies in the decentralization. Unfortunately, decentralization is threatened by centralized mining operations who resist changes to the network such as migration to proof of stake. Bitcoin also suffers from the same problem with miners effectively controlling the protocol and as a result the coin has remained static for a long time.
Monero seems to be having success avoiding the influence of miners. They adopted ASIC and GPU resistant algorithms which makes it viable to mine XMR on normal CPUs, allowing more people to participate and as a result making the coin more decentralized.
My country experienced runaway inflation in the 1990s. In a desperate attempt to stop it, the president just froze everyone's bank accounts. The government took away everyone's money out of nowhere. So I don't really care how much energy cryptocurrency consumes. If it puts an end to government stupidity it's worth it. The more they hate cryptocurrency the better -- it means they can't control it.
People created Chainlink to bring real world data inputs to Ethereum software. Data such as "package has arrived to its destination". It hasn't delivered on its promise yet unfortunately. If it ever does, all bets will be off.
Although I am generally against cryptocurrencies, I cannot be against the idea of building a decentralized banking system (cryptocurrencies are merely cash). I mean, if we get to do it with fiat, they surely deserve to do it with their cryptocurrencies.