The more I read people saying that Claude is failing, the more I realize this is 90% a user problem. This is just an example, but I see it often.

Claude has a mode specifically for what you're talking about, it is actually very good (Opus 4.5) at planning and going through design without coding, it's called planning mode.

Listen, if you aren't constantly shift-tab or esc-esc during complex problems, and then struggling when it isn't working for you, rtfm, you'll get further and better results.