I have 20 years of XP in this industry and build large gov services, and I am astonished that Google allows itself such a failure.
If you want, I will make a gif of Gmail unresponsiveness in default Chrome browser on 50MB connection - taking more then a minute to load and then some more to stop glitching. Then I will show you ProtonMail, Zimbra etc. having no problem whatsoever.
Its embarrassing and affects all their cloud tools in some measure. Google was once a good company. Today, most of the IT people I know or work with try to replace anything google.
Above post from the google employee which "cares" makes me angry - what do you think m8 ? That we are squirrels ? Shame on you. If you have some moral decency that you propagate here, go and work for somebody non-evil, take as many people you can with you and write a blog about it so anybody can know.