My guy, you’ve got absolutely no idea what you’re talking about and it’s embarrassing.
Manufacturers used to sell phones that you had to have plugged into the wall at your house, and consumers gobbled them up. The market has innovated, and now consumers expect something different. How is “consumers used to buy x when it was all that was available so obviously they must prefer it over y” anywhere close to a rational argument?
My claim was that phones are thinner with bigger batteries. Your s21 ultra has a 5000 mAh battery, the note 4 had 3200 mAh battery. The s21 ultra has a much bigger battery in a smaller footprint.
The smartphone market is insanely competitive, if any manufacturer were deliberately making their phones worse, other manufacturers would be capitalizing on that and taking their market share. Phones are easier to repair today than they were 3-5 years ago, you can check out the ifixit repairability scores if you want. Phone firmware is no more locked down now than it has been in the past, unless you’re specifically talking about how much worst modern pixels are than they and nexus’s were in the past. I don’t know about Androids since 2020, since that’s when I switched, but the steel bezels and flat glass on iPhones since the 12 pro make them FAR more durable than any phone I’ve used. Haven’t had my phone in a case for 3 years, and there have been a handful of times it’s fallen out of my pocket while getting into my truck. The stainless bezel doesn’t deform like aluminum, so side impacts aren’t transferred to the glass. Countless drop tests corroborate this.
You think phones are getting worse because you want to think that, despite the objective reality. You personally want a feature set that’s not widely popular, and you’re mad about it. Which I actually totally get.