Can you please share, if you are comfortable of course, what did the model(s) mess up? what were you using codex/cc/pi? did the project have a solid agent.md/claude.md? I am genuinely curious whenever someone have such a low success rate with models what is happening because it could be fixed maybe?
From my own experience using agents for the past year or so. The rate if I have to guess, is well above 70%. I mainly use claude (opus) on typescript react projects that are well setup with minimal plugins/MCPs!
happy to share more if you are interested.