I don't want to pile on, as quite a few people have already commented under this comment, but I would really like to know why you feel the compiler is "grumpy".

I don't want to pile on, as quite a few people have already commented under this comment, but I would really like to know why you feel the compiler is "grumpy". Others and I have spent a lot of time trying to make the diagnostics clear, understandable, friendly and actionable. If there are cases we are failing at doing that, I would be more than happy to hear about them! I hope it's not the tone, but rather how nitpicky the language feels, but the target is for most of the seemingly pedantic or arbitrary restrictions to give you guidance on what needs to be done instead.