I see a 'user rating' (voting) that i cannot disable

-- If you see at the top of your article / item pages a 'user rating' that you cannot disable it is because it is not the FLEXIcontent 'voting' field.

-- the one that you see is Joomla's Content plugin "Voting", so go to Joomla's Plugin manager and disable it

NOTE: our voting plugin has more options than standard Joomla voting plugin like:
-- AJAX voting
-- Ability for multiple types of Voting besides the "Overall" , e.g. custom ones like "Quality", "Speed", "Endurance" etc