Try "If target creature leaves the battlefield this turn, return it to the battlefield tapped at the beginning of the next end step" unless there is a particular reason you worded it this way.

Well this way the creature never leaves, meaning auras, equipment etc don't fall off.

You need to remove damage from it as well. If you have a 3/3 with 3 damage and this on it, the game will be a draw since state based actions will keep trying to destroy the creature. I also think it should be an instant, since the main point is to save your creature from removal spells.

I tried fixing it but instead I made the greatest combo card with Phyrexian Dreadnought