Actually their pages say it is hard to find Linux devs for desktop, and that is why it is slow. And there is already a proton drive API you can use with rclone on linux.
And as far as critisim you said specifically not as good as google, so I provide a reason why. you can’t then change you tact and say it wasn’t critism whenvyou do a compare. It will come, things take time. You seem to keep moving goal posts here so have a good rest of your week.