I simply cannot agree with you on this one; in my book, it is not in any way a perfectly sensible decision to make a browser that a ton of people were still using entirely crash when webpages using the library were opened.

The project I was working on was the kind of thing that probably had just a couple hundred people (if that, maybe even less) visit it during our testing period, and I got multiple reports of that crash.

If you want to popup a dialog box on these devices that says "I'm sorry, you are not supported" that's fine, but if it isn't even being on a browser like that, then no: it becomes entirely correct to point out that it was never actually good at handling cross-browser compatibility issues.