In my opinion, they look like very badly scanned. I once had experience of similar coarse and smeared grain when using a very (but I mean VERY, VERY) old bottle of Rodinal, that was even left partly open, so I guess it had gone bad. This is to say that it also makes me think about a nearly exhausted developer. I am an amateur and beginner too, starting black and white photography, so I am saying this based only on my personal experience and not thorough testing. But I really like your photos and wish you to find the culprit and improve your technique.