I don’t think the keyboard is any more broken than it has ever been. It works pretty well for me aside from its awful, awful repeated "corrections" it applies, I delete and it reapplies. This is not new at all.

There are a lot of broken things in iOS, just try any apps in landscape and you'll wonder if QA even realizes the iPhone has landscape.

Someone actually took the effort to make a video to show how broken it is, it’s worth a watch: https://m.youtube.com/watch?v=hksVvXONrIo

It’s only 2 min 24 sec.