@mrherewriting
As a reader (when I enjoy what I'm reading) I never notice the telling vs showing, the "Was" making a sentence weaker, overuse of adjectives
It's like when an author wrote a story using character-driven vs plot-driven. The reader will have no idea which technique the author used. In the end, it would be hard to determine (and who cares?).
The whole idea of the "rules" or principles or techniques for writing fiction is to make the reader enjoy it more. Not for the reader to say, "Wow, this author is great because he didn't use adverbs." In fact, if it takes the reader out of the story, it's bad. The techniques are ways to engage the reader, to engross them in the story, to surprise them, etc.
And techniques change. I don't know if it's the chicken or the egg β if authors start writing differently because readers now like to read differently, or if authors write differently so readers learn to enjoy reading that way more. I've used this example before. My wife has a masters in English Literature and Creative Writing. A few years ago she decided to re-read "Madam Bovary." She liked it way back, but now stopped reading because she found the writing stilted (her word). The novel didn't change, but her reading tastes had.
As to Stephen King and adverbs, you're right, he uses them a lot. I never read his book on writing fiction where that came from, but I assume he wasn't saying adverbs, per se, are bad. When he said "the road to hell is paved with adverbs," I'm assuming he meant putting adverbs on dialogue tags (telling vs showing).
As to "was" in my WIP where this example came from, doing a find on whole word found 3,067 of them in 141,519 words. I'm still writing so I haven't done a heavy edit yet. But I don't set out to eliminate the word "was." I look to see how I used it. And even if I use it to "tell" (rather than "show"), if it should be told and not shown, it's the right word to use.