that's something that apple is doing right. it's too bad they control everything else inside their ecosystem.

Why iCloud Keychain? Syncing keys never seemed like a good idea.

Believe what you may. The only real solutions are DeGoogled phones and Linux phones, running nothing but FOSS apps, syncing to your own Nextcloud online ecosystem. DeGoogled phones run great! Linux phones and DeGoogled phones are all I've been running for a couple of years now.