Ive owned two 4ages, one which developed shitty rings rather fast, and even when it was really smoky, it never did this. Ive always connected my catch can to the port on the back of the 20v cam cover, and the dipstick tube.
You do not want whatever oil that gets fired from the motor to go back in. Catch cans can collect moisture and really shitty oil, so you dont want it to ever purge it back. I too had a shitty catch can that was made in three pieces from drift brand or some shit. The leak was fixed by throwing the shitty cheapo useless can in the bin, and buying a bigger better one.
Did you reinstall the pcv hose in the right place?