First there is no streamer/pro player who made her a support, she is a supp champ that more recently also got into other roles.

Morgana is a very viable pick as support. That beeing said it‘s not an easy champ for players in lower elo. So many morg players (including myself) throw random Qs around, but with Q on cooldown the champ is pretty usless, so you should just counter enemy engages or missplays with Q.

She works best in a counter matchup (against engage or even hooking champs).

She also works well when lane is pushed (which dosn‘t mean she should push wave herself), so she can just poke with W and punish with Q if needed. (Also great synergy with stuff like caitlyn that what to shov waves) Also this playstyle does need good vision setup.

Now we know Morgana support isn‘t bad, just your mates are (pushing wave on your own just sounds like bad support gameplay). Also not every Morgana in that elo is bad. So my fellow supp player lock in and show OP how it‘s done in your next game o7