Problems with rubber-banding and freezing in CS:GO

The two most likely possibilities are playing with a high ping, or on a low-tick server. If you are on a valve server (64 tick) then you will probably be experiencing ping problems - in which case all I can suggest is you ensure nothing is nibbling on your bandwidth.

as someone who was born into laggy connections I can safely say any background downloads going on around the house can have a VERY severe impact to your connection