I don't think it is a coincidence that Lee Sherman worked mainly for Fox Features, Robert Farrell's publications, and Charlton, none of which had high standards for their published artwork.
I think that could be said of many publishers of the time really, or the bosses at the top to be more specific, only going as far as the bare minimum of mostly coherent stories and passable artwork so as to justify to sellers to put them on the racks, with varying factors thrown in as to what stories look worse than others depending on deadlines, exceptions being made, how motivated the artists are aside from pay, etc. Sure, there were companies that specifically focused more on making them art look great, though the writing might still end up being less than stellar. I know that EC is the biggest exception there, even if some other comic enthusiasts from today might not be particularly interested in their material either even if they recognize how politically, socially, and gory EC could get, in favor of modern comics. Just another matter of what standards we have ourselves I suppose.