Getting frustrated at work happens to everyone, and everyone should prepare their own survival tactics for feeling overwhelmed or frustrated.
When your work is customer support, and your job is to wear a happy face while dealing with angry customers, well it can be challenging to say the least. Heck, sometimes I get overwhelmed and frustrated when I get two chats at once and they're not both asking, "Where is your pricing page?" DO I LOOK LIKE I HAVE ALL THE ANSWERS PEOPLE?
I digress...