As far as displays of poor workmanship goes this doesnt make that list at all. Yes it could have been done abit better (and ALOT worse) but at the end of the day its all about working gas pressure at boiler. Without adequate pressure your boiler cant be signed off. So many boilers are put in these days with no regards to gas pipe and pressure. Money down the drain.
If you want to see what bad work looks like check out the hall of shame thread
If you want to see what bad work looks like check out the hall of shame thread