Where to start? Horrible color choices aside, there's so much more to hate. After not having to login in years, I seem to have to login every 10 seconds. Want to look at PMs? Have to login. Try to get to the Control Panel? Have to login. Go to a different area? Have to login. Post a new topic? Have to login. To make it worse, most of my login attempts fail.
On top of the multitude of login requests, my preferences don't seem to stick. Enemy posts are showing up. Avatars are showing up even though they're turned off. I'm sure there's plenty more that's not working, but I've about had it.
Can you try troubleshooting that?
E.g. when do you get logged off - is it when you follow up a link from email notification?
Does it happen if you manually delete all cookies to *.roku.com? Which browsers and OS? How does it (mis)behave in incognito window? What if you disable all extensions, does it work in vanilla browser?
You'd know i am not apologist - and i have no doubt what you describe is happening - but let's track to the "why" of it, then can tackle it.