With the risk of sounding like I'm brushing off what you're saying (I am not) and breaking one or two rules on this forum, please read the article because it addresses your question to some degree.
For example (my emphasis in the quoted texts):
> Together they urged policymakers in 14 countries that straddle the Atlantic to take action against enshittification, arguing that it was not an inevitable process but rather the result of policy decisions.
> Policymakers were urged to double down on the enforcement of existing laws, such as those designed to protect consumers and their data, as well as work to foster greater competition in digital markets, for example through the use of public procurement processes to favour alternatives to big tech.
From the report (my emphasis in the quoted texts):
> The path we are on can be challenged and reversed – we can have a better digital world. This requires rebalancing the power between consumers, big tech companies and alternative service providers.
> The fight to disenshittify the internet is also a fight for innovation: Big Tech is able to enshittify their services after they have become dominant and restricted competition. By pruning back the excesses of big tech, alternative services can get the nourishment they need to grow and flourish. However, this requires active policy choices and vigorous enforcement of existing laws.
As you can see, it's not merely a case of building better alternatives, although that plays a role. The biggest issues stem from market dominance, preventing the emergence of new players and innovators, using existing (huge) leverage to pass preferential laws etc. This is a systemic problem, not one that "the market" should solve.
So it's just anti big tech all over again right?
The links I mentioned explain precisely (and at length) why you cannot "just build it yourself".
Enshittification means a lot more than just "we made it worse". It's more "we got in a position where we could make it worse, and nobody can do anything about it". Of course I oversimplify it a lot, I just can't say it better than Doctorow.
Again, I suggest you watch that 39C3 talk (it's like 45min?) because Doctorow talks really well and it's a very good introduction to the problem. His book goes into a lot more details and gives a lot more examples, but I understand that it's already almost impossible to get someone to watch a 45min presentation, so reading a whole book is out of the question for most people... :-)
Business loses money to gain customers and then need to make a profit.
I'm shocked.
Do we not know how businesses work?
If you don't find enough value in the business, just quit and find another or build one yourself.
Upfront investment, the network effect or vendor lock-in work against you. Linux is doing that competitive rebuild for decades.