Performance: abhorrently slow and resource-intensive, especially when running multiple tabs or extensions, with sudden unexpected crashes
Compatibility: lots of issues with applications that are optimized for chromium-based browsers
User Interfaces: less intuitive, everything somehow seems to be hidden, and inaccessible
Features: poor integration for specific services and devices, overly cluttered customization options, bad coding paradigms
Versions: each successive browser version feels slower, buggy, with poor features, poor memory management, and more crashes