回复：同事还说，写信没抬头，至少那个老师不是很在意跟家长的互动。

 Stop asking your colleagues for input, suggestions or strategies, and when you do ask them, please take them with a grain with salt.  Do you expect them to contradict you in the first place?  They are being polite.  

Stop looking for fault in others.  

Stop connecting dots.

Start spending more time with Ben.