I worked for 7 years for this company, was let go ...

I worked for 7 years for this company, was let go due to lack of work , only to find the guy who covers for me on my days off, in my bay and all my stuff no longer there, yet, somehow my back up was still employed and working my shifts at that point, even Though there was lack of work . They fired the previous technician before me, in the same exact manner that they let me go. Basically having your back up replace you.
I am grateful only for the experience and knowledge I learned, but I do regret going above and beyond for a company who will drop you without a hesitation.