IIRC they blamed Metux for unnecessarily breaking BC, e.g. renaming & moving around symbols when it wasn't necessary and didn't improve features or fix bugs.

When you're working on something this foundational, BC breaks should always have a good reason, and he repeatedly didn't give any. This causes churn for all downstream consumers.

It's just how it is, there is no way around it.

There literally is a way around it: not doing unnecessary BC breaks.