I'm on OCE too
Been churning through some ranked games recently, got myself to Gold I. Finding it rather difficult to promote. Doesn't help that I keep getting matched with high plat and low diamond players :/
And here I am , unable to win a single match and getting killed over 20 times
I'm back to smurfing. Screwed up placements, got to Bronze 5.
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That's actually pretty good. Your MMR is high, good luck making the jump to platinum.
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Which server?
You'll get the hang of it eventually. You probably get killed over 20 times because the number of smurfs at lower levels is increasing.