Are you saying you're opposed to responsive design?
There's also the sites that take control of my keys so I can't use them to navigate; or those that disable operating system features such as copy and paste. Both of those are the opposite of useful.
If you want more trust: build and sign a native application, and don't be overly generous on the permissions you request. There's no reason a message app needs audio permission until the moment I intentionally start or join a voice conversation. Same for the camera. Same for saving data to the local disk, too, really. There's definitely no reason you should need administrator permission. And that permission should be revoked when the conversation is done.