It also doesn’t help that Lovecraft was at the tail end of an old style of writing while in many ways being a forerunner of a newer style. Makes his works kinda clunky if that makes sense, like I get the same feeling from Mark Twain for example. So the tedium probably comes from being not quite old not quite modern where it just ends up awkward, also tack on the fact he was revolutionizing suspense in a lot of ways and yeah… Not fun.