It looks like Ryan forgot to take his medication today.
He forgets to take his medication every day.
He has a hostility toward mental health so I presume he has been in treatment before and had a bad experience (they told him he was delusional).
While others here have antiscience beliefs due to their religious preoccupation this is not the case with Jim. He is really delusional in the classic sense and his religious beliefs are a distant issue.