All you're saying is that (the harness you're using for) Gemini sucks. OpenAI has their own web browser to fill out forms with and Claude has a whole Cowork feature that interacts with you computer including your web browser.
If new Siri still sucks, well, it's sucked the entire time. The worst of it is the security aspect where the setting to let you use Siri without authenticating hasn't worked since they added it! (still broken, iOS 26.5)