I got my bees in mid June and they haven't made enough honey for me to take this year. I had a swarm after a month and the new queen isn't laying as well as she could do, so they are a bit weak.
Make sure you source your bees from somewhere reputable! I suspect the guy I bought mine from knew that they weren't great. Easy money for him and loads of worry for me!!
'reputable' normally means paying through the nose for bees that are
often no different than you would find elsewhere... or imported.
Your first statement is common amongst new beekeepers... your second is very sweeping and quick to criticise the supplier. Why do you suspect the guy thought they were not great?
I have bees from multiple sources, and have gentle bees that do not produce a great deal, darker grumpy bees that produce a huge amount.
there are 'swarmy' bees, but these often are good layers. I use these colony's to produce workers to raise 'good' queens.
I have several sets of bees that were NUC's in June, and the majority have not produced honey due to the crap August, and several still do not have a super.
Your new bees probably came as a NUC. Moving from NUC to hive may produce a swarm. Generally, NUCs are sold filled to the brim, and moving into a new hive gives them little room for rapid expansion which is why it is good to feed to allow them to expand quicker than foraging. Even then, they may decide to swarm anyway.
I find moving a big NUC into a hive with empty frames, and are fed, also expand quicker, and less likely to swarm and expand quicker than a hive with frames of foundation under the same conditions.
QC's are
almost always a precursor to a swarm. If swarmed after a month, there is a good chance you could have seen it coming.
if your hive is weak, you should have either moved it back to a NUC, or dummied down the hive. If your hive is weak, you should not have a super, and possibly thinking of feeding with thymolised syrup to prevent it spoiling in the warmer weather. (or if wasps are a problem, fondant)
A full hive and a super is a lot of space to heat, and a less than full colony would progress very slowly, and in this weather, may go backwards.
It is very easy to say it was the bees fault, or the bee suppliers fault, but a swarm after a month of being a NUC, and a new queen in July would not necessarily mean a strong colony now with honey, even if August was good. If your bees are being kept 'baggy', your queen will not be laying well.
A small colony in July 'may' give honey in late August\early September in good weather, but with crap weather, getting them into autumn in a fit state to survive winter should be your priority.
There are many ways of doing such things, and although a valuable tool, a book is often a single beekeepers view of doing things. It should be guide, not an instruction book.
Experience rules, and having a mentor with a good amount of experience counts for a lot. A 'good' mentor will help you select bees or teach you what to look for. If no mentors are available, that's what books might teach you, and what forums are for... to help.
If you suspect the bees were dodgy to start with, you would have had warning signs by looking at his parent colony's, or looking at the NUC itself and not buy them.
Books also often tell you what to do, not what to do if it gone wrong.