I use a variety of tools for writing, many of which have their own spellcheck or grammar check functionality, and am pretty consistently impressed by how good these are (Google Doc for example is great, as are most IDEs). But Apple's spellcheck is consistently abysmal, both on iOS and macOS. It routinely proposes incorrect "corrections" and fails to assist with even the most rudimentary typos, often failing tp provide any suggestion at all or — worse — promising a substitution that is clearly inappropriate. For some reason, it seems worse in Messages and Mail than in Safari (e.g. composing here, of that's using Apple's).
Is there anything I can do to improve Apple's spellcheck? It's gotten to the point that it's interfering rather than helping.