It sounds like he's just overtired all the time. My ds is a good sleeper usually, but if he misses his day sleep then he doesn't settle well at night. I like the earlier suggestion of cuddles/quiet time late morning to try and get f=him off to sleep. He "should" (and I hate saying that as what's normal anyway??) be having a good sleep of around 2 hours through the middle of the day.

Sleep does induce sleep!