> this law will make phones _worse_ for most people

I challenge you to give me an example of how this law might result in a phone that is worse for most people.

This law does not require a slide-off phone cover. It does not require a screwed-on backplate. It does not forbid the use of chemical adhesives. It does not stipulate how a phone should or shouldn't be designed.

It basically just requires the manufacturer to offer replacement batteries and to enable the replacement to be done with commercially available tools. I'd wager the overwhelming majority of phones are already compliant, pending availability of a replacement battery from the manufacturer.

I'm quite confident I could replace the battery on my Sony Xperia 1 iii with a heat gun and my basic iFixit toolkit.