Some people did all the steps to complete the MMXIX title but lost it simply because they didn't click on 'Claim'. Be sure to claim your title if you've unlocked it. Just a heads up. EDIT: I'm not telling anyone to actually go and get the Title. I'm saying IF you have it, don't forget to claim it.
I thought I'd done enough for the title, turns out you need to do pvp stuff to, which is a no go for me. I spent so long getting every kill and farming vex offensive, getting melee kills on the moon etc etc, and I only found out today I also need to get Edgewise and other stuff from Crucible which I have zero chance in doing since I have zero experience and I tried a couple of matches and got zero kills with a scout rifle.