There's some irony in this for me personally. My most recent major "I quit Apple" rage moment was trying to get Flameshot (which I use routinely on Linux) working on my Macbook, so I could more easily take screenshots, just to share something with a friend, because the built-in screenshot functionality in MacOS is so clunky. Between Gatekeeper and the XCode upgrade train, Mac OS's dogged insistence on not letting me run the software I wanted it to run worked me into a rage and I swear I'll never buy another Mac for casual daily computing again. They've really ruined the OS.
I’m curious: what is so clunky about the built in screenshot app? I don’t doubt you, I’ve just never had that experience, and I’m curious what I’m missing.