Chimney flashing and half cricket: http://imgur.com/a/E6hve
"Finished" chimney flashing: http://imgur.com/a/WUA7n
Mess: http://imgur.com/a/dfmo7 (Not really important, it was cleaned up, just little pieces of felt left behind)
My issues: https://pastebin.com/JVgEmx1X
This was a roofing job done for my parents. Are my issues valid, what do you think? I also do not want them to come back, so what is the best way to go about this?