if it was just one I would agree but I cant recall the last time I had a good plumber or even heard of one ...
my mate the joiner is a bit pi55ed off with the current one too as he recommended him
...another friend the builder has long since stopped using them wherever possible ... why because they don't need some bleating pikey fresh from a two week course telling them their tales of woe just before they cock up another job.
There are good and bad in all trades agreed... just like not everyone who drives a BMW is a gimp ... just that a higher percentage of gimps are attracted to BMW's same with plumbing in my experience...
sparky's only had to sack one otherwise all pretty decent just difficult to get the good ones sometimes as they are always busy
joiners never had any problems of any major sort
builders not too many issues really considering
brick layers generally no issues one or two who werent ads good as they thought they were and a bit messy in their work
ground workers never had a problem yet
drainage all decent
roofers generally ok and some I still go and look at their work as it is a real pleasure to see a well done job of theirs especially with reclaimed or older style materials
land drainage all ok
contract farm workers all good and tidy...
...and youll be glad to hear

gas engineer current one is British gas contract and a very decent bloke who is happy to come back on the same call out if we have a problem
there is the one that came about 10-11 for an hour and left his granddad working whilst he ran off to an emergency ... every day more or less and insisted that all the other trades had to work to his spec and then tried to double charge ... he was recommended
another ex British Gas OK didn't know how to drill holes or knock out flue holes or hire a core drill loved putting extra unnecessary bends in stuff but couldn'tt make a straight connection decent bloke though once you had let him go on for an hour of your time about how hard the life of a plumber was
emergency plumber we have multiple leaks here whats the best thing to do I know lets turn everything on and go for a brew
another well I told you I would be busy in September
you started the two week job in beginning of August and Its November we haven't heard a word from you and you are wondering why we carried on without you ? .... hmnnn the word off came up a lot in that conversation along with invoice itemized bill vat receipt vat man funny never heard from him again about the money he reckoned he was owed
and I have at least a few more plumber related mishaps including the one that ripped off the octagenerian neighbour and then threatened to burn his house down if he went to the police ... oh and my brother is a pipe fitter and they don't appear like plumbers much either though to be fair it does seem to be more the domestic / residential ones
plumbers ... higher percentile of cock monkeys than other walks of life in my experience