Every coin in history was called a scam by someone. I will just give you a few links to older threads that called some coins scam and you try to draw some conclusions from it...
This first thread about Ethereum being a scam is such a good laugh today.
https://bitcointalk.org/index.php?topic=707237.0
https://bitcointalk.org/index.php?topic=1637318.0
https://bitcointalk.org/index.php?topic=448643.0
If the onions stand the test of time, what have they done XMR,ETH and XEM for the crypto industry,it is possible and about a bow someday so write as an example of a successful project. In the meantime, and will discuss negatively,IMHOThis first thread about Ethereum being a scam is such a good laugh today.
https://bitcointalk.org/index.php?topic=707237.0
https://bitcointalk.org/index.php?topic=1637318.0
https://bitcointalk.org/index.php?topic=448643.0