BuddyPress.org

1) Re: delete not deactivate

You can safely delete each Group you’ve created in each Group’s admin settings.
You can uninstall the Forums for groups in dashboard menu BuddyPress > Forums > uninstall group forums.
You can uninstall Sitewide Forums in dashboard menu BuddyPress > Forums > uninstall sitewide forums.
Then, go to BuddyPress > Components > remove checks for User Groups and Discussion Forums

2) Re: if you look at my site http://www.sweepbook.com/rate-this/ you will notice the menu items are on top of each other

– I don’t see that in your site. So it’s either you’ve changed the theme to bp-default theme or you’ve decided to use bp-default’s custom menus to organize your links.

3) Re: The logos on my site, redirects to http://www.sweepbook.com/rate-this

– Right now I see that you have HTML pages at domain root http://www.sweepbook.com/
So where did you install WP/BP, in subdirectory rate-this? and the redirect is to
redirect is to http://www.sweepbook.com/sweepbook/rate-this/ .
WP Settings > General > Site Address URI/WordPress Address URI was changed without proper checks and this is not a BuddyPress issue at all.

https://codex.wordpress.org/Changing_The_Site_URL and if that doesn’t help you resolve the problem, please post at https://wordpress.org/support/forum/how-to-and-troubleshooting