not necessarily manufacturers but the open source community can support 10 year old phones with new security updates like the LG G2 and Samsung Galaxy Note 3 LTE. https://doc.e.foundation/devices

On IPhones there is not really such a community because apple aggressively screws people for profit and will stay to do so in the future because that works.
Other companies copied Apples design choices like unmovable batteries because that works. And some fans argue "but not replace batteries are more water proof" and such but the phones only got more fragile.

And its not like they are the best in customer service, i mean they only offered repairs for design flaws when a lot of people sued them: https://www.youtube.com/watch?v=AUaJ8pDlxi8&t=801s&pp=ygUUbG91aXMgcm9zc21hbm4gYXBwbGU%3D (25 minute video by Louis Rossmann about apples repeated design failures)

And for the M1, i looked into it, nice that they don't lock the boot-loader without jailbreak. But they don't help with the OS, that again is the open source community.

And you are right: Apple is not the worst, Nestlé is the worst but a completely different topic.

I know that the products of apple are very user friendly and everything can like work together. The software is brilliantly comfortable so that a users don't want to use everything else, because how comfortable it is. For me it is a trap by a greedy mega cooperation.