Here is a solution to report such players. At the end of the game, at tallying of points and scores, click the upper right icon, yes the exclamation mark(color red):
If done correctly, the Green Icons (Add friend) will turn into red Exclamation marks. Select the player you want to report, for example Eudora player:
Afterwards select the reason why you want to report him. This time I selected Going AFK then confirm it by clicking Okay button:
A confirmation message will appear and show that reporting process has been completed:
After that, a verification email will be sent to your inbox:
The mail refers to the report feedback of the player. The punishment is deduction of Credit Score that can lead to ban from rank games.