Experts and non-experts can argue about comedy and comedy-writing till the cows come home but when they do come home (which is, as everybody knows, at the end of the day) I don't think anybody in his/her right mind could say that script isn't funny.
Given the very nature of the characters, comparisons with Carla Lane's "Bread" are inevitable. For me, your script comes out of that comparison pretty well but that might not be the point. The point might be that Carla got there first in the 1980s and that might be enough to put some TV bigwigs off the idea of commissioning something similar in the 2020s.
If they were simply looking for "funny", that script would suit them down to the ground. The snag, however, is that they are never simply looking for "funny": they're looking for all sorts of other things and those other things are changed almost on a daily basis just to keep writers on their toes.
There are some beautifully funny lines in that script, Teddy. I'm sure the TV people cannot fail to have been impressed by the funniness of your writing and therefore, by extension, the funniness of your mind.
I don't think you've wasted your time writing it: it's entirely likely that someone from the BBC who has read the script or someone else from somewhere else who reads your script is going to want you to write something for them.
Carry on writing!