<human>: Two years ago I loved my job, took a ton of pride in my performance, and derived a lot of my self-worth from my abilities. 

A new employee came in and immediately began criticizing my work and undermining my relationships. After years of being a reliable and appreciated employee, this employee began treating me like an incompetent five year old, and I felt that this rubbed of on my coworkers.

The stress of this led to a lot of sleepless nights, weight loss, and emotional upset. I couldn't win for trying and eventually I lost joy in doing my job. 

The employee was eventually let go and after comparing notes, my coworkers and I realized that this employee had spread misinformation around the workplace, causing a lot of unnecessary tension and turmoil. Now that things have been cleared up things can get back to normal. 

But now I find that I can't recapture the joy and pride I had felt previously. I feel apathetic about my work, and find myself procrastinating and performing below level. This is my dream job, my heart is in it, but I just can't motivate myself to put my all into it anymore. I'm really bothered by this and would love to get back to work. I'm not sure why I can't, and would love some advice.

Can you provide a brief overview of the text?
<bot>: New employee at job undermined my performance and relationships by spreading mistruths. Now that she has been let go, I'm struggling with getting back to normal.