I was just flamed at by BOTH TEAMS for not going for a kill in normals?

So long story short our SUPPORT with only a frost queen`s claim "the double ghost item" was attacked by the enemy JG, he popped ult and used his q on her so I hit him with my stun as JG, I only had cinderhulk at the time and he was atleast 2 levels above both of us and already fed *we were both lvl 6-8 ish?

So I get flamed by our "support" for running after I stunned him, and not ulting. My response was that is too tanky compared to our sht dmg yes had over 1.3k hp and ult would have done less then 500 if he stayed during the full duration, and I certainly would do less with my full kit.

Not to mention he already had already used his ult and could run as soon as mine finished its duration

So what bothers me the most about this is people kept quoting me saying "yi is tanky" and multiple people keep telling me to stay in bronze which i dont fking understand how they didnt get my point when I said me and MissFortune did no dmg ofc hes gonna feel like a tank.

Seriously i get attacked by constant flame for not trying to kill a fed yi in normals.....

They even left before I could finish stating my arguements to defend myself?

Asking what drugs am I on, calling me a noob, etc.

I thought was really weak early game, or am I wrong and diserve to stay in bronze for thinking that...