While you're correct that nobody is "forced" to use Huawei, but China does all sorts of things to encourage its citizens to use Huawei devices over foreign.
- Chinese government agencies have prohibited employees from using non-domestic handsets.
- The Chinese government has advocated using products from Chinese companies as a form of patriotism and national pride
- The Chinese government has given Huawei substantial financial support, include loans, credit lines, and tax incentives
- The Chinese government has given subsidies to purchase smartphones priced under a certain threshold, making Huawei products more affordable for lower-income citizens
I'm not saying any of the above is wrong, and in fact I'd encourage Europe to do a lot of the same things to encourage a European brand to rise up. But doing stuff like that is how the Chinese government helped a competitor form. Just coming in with a law like the DMA isn't going to add a third OS. And the west (correctly, IMO) isn't going to let Huawei come in because of their massive ties to the Chinese military-intelligence complex. So, why won't the EU do the hard work to support a "domestic" competitor like China did?
Users going forward aren't going to use search the way you or I do. They're going to use AI. So all this is doing is closing the barn door after all the horses have already escaped, while annoying users by making them select Google Search when 98% of them were going to select Google Search anyway, and the other 2% already know how to change the default search engine.
Again, the EU is perfectly within their rights to demand a start screen to select a browser/search engine. But all it's going to do is make Chrome/Google Search stronger and not actually do what the regulators think it's going to do.
I think we’re just fundamentally not going to agree here and that’s fine, but I'd argue you can support home grown innovation without restricting others. And nothing the DMA does is going to result in new competitors coming up to fight Apple or Google. In fact, it's more likely to cement them in the short term than anything else.
But arguing "no one can ever compete" with Apple and Google is like saying the CEO of Palm saying:
People are already starting to talk about how Apple's stance with developers and lack of AI coding tools is making Apple platforms a much less attractive proposition for young developers. Can Apple turn it around? Absolutely. But assuming Apple is forever going to have 30% of the market because they currently have 30% of the market is just as silly as thinking because IBM owned PCs IBM would always own PCs.