I agree. Especially during peak hours, players in the CN server can't even have a single 5v5 battle. They just disconnect from the game frequently on both sides and when they reconnect they've already gotten killed so that they have to watch their troops fighting. The scene is ridiculous.
The bad server performance is one of the main reasons why most Chinese players move to EU server.
This problem must be solved or there will be no Chinese players any more on their own server.