ayy lmao
idk i think main reason i stopped was because i got bored of it
hit masters last 2 seasons with ana, but now doesnt seem worth playing support xd

true, maining anything makes you bored eventually, unless you're playing your role in premade team

try out some zen
been able to carry pretty well with it lately assuming the other team isn't some shit like winston/genji/pharah
am only low 3k tho

pretty sure it has to do with your hidden mmr or where the game thinks you belong. usually happens when you climb to a peak you haven't been at before.
i've floated at my peak for a while now but at first i would consistently gain 20-22 but lose 27-30.
if you're peaking way above a previous "normal" sr for you, that could explain the big numbers.
also ana's my second most played this season and i haven't noticed anything about gaining less because of supporting