No, from my experience, many people consider short reply to a long message a sort of dismissal of their effort, and if it uses slang it seems doubly offensive.
Right. My sense is it’s a dismissive and/or low effort response, especially to any sort of substantive message. But I’m also an anxious person so I’m likely reading into it too much.
My typical reply if I want to quickly acknowledge something is, “Got it. Thank you!”