Lg G4 default Contacts app

I like the framework of the default 'contacts' app that was installed on my smartphone, but over the months, changes have occurred to this app which I cannot manage. For instance, I like the 'group' concept - but some of my groups have now been duplicated (some groups with zero content) and I cannot remove those.  Other things with this app cause me to want more simplicity and control.

I've looked at Contact+ but it doesn't have the segregation of groups which I like.  Any ideas?

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