When illaoi came out i saw potiential as a support. But the entire time I played her support i saw flamed and called a troll even when it worked out. Same happened when i tried Ao Shin jungle and somewhat with Taliyah support. Its like people don't even expect experiementation when a new champion is released.
called a troll even when it worked out
No you didn't. Stop bullshiting. Everytime a new champ comes out I see people play them in all roles without anyone saying shit.
Her kit hasn't changed since release. Why aren't you still going support?
You got called a troll for playing champs in roles they're shit in?
What a surprise!
I'm pretty sure they even acknowledged 
as a potential jungler (assuming you're referring to that when you say ao shin) when released, and I know rioters commented on taliyah sup (albeit saying that it probably wouldn't work out very well).
Everyone experiments when things come out regardless, and pretty much everyone does bad with the new champ wherever they are regardless (or if they're OP, they do well regardless). After the first few weeks once people know how the champion works roughly, people will also know what roles they're best suited to, and expect people to play them there as is appropriate.
