Having read all the Hardy Boys as a child, because I was told I had to read something, I can definitely agree they are not particularly enjoyable.
I also chewed through a number of an earlier Stratemeyer Syndicate production - the early 1900s boy genius space rockets, satellites, and monorails across Africa wonder of Tom Swift and ...
https://en.wikipedia.org/wiki/List_of_Tom_Swift_books
At least they didn't suffer from Alfred Hitchcock shoehorning his way into every book: https://en.wikipedia.org/wiki/The_Three_Investigators
All that US origin "children's literature" pushed me into Canadian, UK, and European reading.