I think it depends on the vibe, for me. I’ve experienced it before where the “feeling better?” questions are sort of like “the last time I asked you if you wanted to do xyz thing, you weren’t able to because of your chronic illness/disability. Are you magically not disabled so that we can do the thing now?”. That’s a different kind of disheartening than the cure suggesters, but not better or worse, in my experience — just different.

It sucks when people who you thought were friends act like they’re inconvenienced by your illness. And don’t get me wrong, it definitely is an inconvenience if a friend is no longer able to hang out in the way you used to, but the primary “beneficiary” of this inconvenience is the one who is actually chronically unwell. I lost a couple friends when I became disabled, due to this. The people who are my friends have worked with me to find ways to adapt (such as running games night at my place when I can’t travel), which makes things easier in that I feel like it’s me + people I love vs. my illness. People who give the vibe of “ugh, you’re still ill” makes it feels like it’s them vs. (me + my illness).

I realise I haven’t meaningfully engaged with much of what you have written in your comment, but that’s largely because I don’t have much to add — you capture the frustration very well and unfortunately I can relate too hard to the silly nonsense cure suggestions.