Yes, I strongly relate however I've had a lot of DBT that's been fine tuned for my autistic/ADHD brain and whilst I still struggle immensely with social anxiety and perceived rejection, I can recognise it well enough to not let it affect me so much. Not quite there yet but much more at ease than I ever was before I understood it.
Really struggled a lot with it in relationships but 2 were abusive which heightened my RSD as my ex partners would know my triggers and use them against me.
Thankfully I do not have to endure any of that anymore and I doubt I'd allow it to affect me in the future as I've done a lot of work on myself around setting healthy boundaries but it's very real and intense emotional pain and quite common in autistic/adhd people.