Playing Off Meta in Ranked = Int Feeding ban?

So I recently received this: With links to the following 3 games: The scores arent so bad and neither are the stats, and 2 out of 3 were wins. Yes, I played off meta in ranked. So I contacted support, and they claimed that that I was trolling and griefing, by playing off meta I assume. So first question, it seems that playing off meta in ranked is considered trolling & griefing, but its OK to do in normals? (thats what im reading here ^) Second question, why don't we have a complete list of which champs can perform which roles, and with which builds? If I can build AD Janna support support and win, why not? If we had a list of all allowed combinations it could avoid this situation for other people, and clarify the rules.
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