Hi and welcome aboard. As far as I can tell the biggest issue is likely your stropping. That said poor stropping on crox just makes it much worse as you are now stropping poorly on abrasive.
Some stropping issues I have seen with new guys is lifting the spine or simply not stropping enough. You would want to do at least 25 linen and 50 leather for maintenance. As yours is not shaving properly I would move up to 100 linen and 100 leather and see if that helps.