Unfortunately, if not done right, a thing like Bitcoin, controlled and supervised by the community can be slow in progress or development compared to few people taking decisions without supervision. Much of the good ideas proposed to help develop Bitcoin without violating the important principles that enable it to be supervised and controlled by the community have not been implemented. This has kept Bitcoin poorly developed and slow in progress causing it to become somewhat outdated, slow, clunky, difficult to use, etc.
Do you compare Bitcoin to certain altcoins here, which market themselves to be "faster", "easier to use", etc.? These altcoins register different tradeoffs. A "high throughput coin" like Solana for example isn't superior technologically to Bitcoin. They can't escape the blocksize/decentralization dilemma, so SOL for example has enormous requirements for full nodes (128 GB minimum RAM, for example, while Bitcoin can run on 8 GB).
Bitcoin deliberately choses to preserve decentralization, because decentralization is the main advantage of blockchains. For a highly centralized system like Solana, you don't need a blockchain really.
And Bitcoin is not "poorly developed" at all. There are many real innovations taking place. The BIP process is quite straightforward, and good ideas without risk to harm decentralization, like Taproot, get implemented.
In some phases some altcoins indeed can look like they developed "faster", but often once they reach a certain milestone, they tend to stay in a quite static state of development.
Whatever advanced solution or progress that currently exist, actually deviate from the original goal of Bitcoin and could lead to crisis.
I think you refer to solutions like Lightning here. Why do you think it "deviates" from the "original goal" and "leads to crisis"?
If not, then please clarify
Poor, deceptive and centralized alternatives have emerged, with solutions that seem to solve the Bitcoin issues, but underneath the whole thing is nothing but scams administered by greedy overlords who lack principles and have little to zero idea (or don't really care) why Bitcoin was invented in the first place
Here I partly agree, centralized L2's are among these solutions. But there is also progress in this area. Projects like BitVM and even some L2s like Nomic and tBTC (Threshold Network) actually do solve problems and push Bitcoin forward.