We made a software for hospitals in my old department. The senior Dev kinda gave me the software, because he thought it sucked and was perfect for a newbie like me. I really loved my work and gave everything I had to improve the quality of software, introduced tests, refactored old smelly code and talked with the product manager to overhaul the ui. Several months later this little shit project the senior gave the newbie, was a huge success and better than any thrash that the senior has created. The senior was really pissed, so everytime I had some days off, he tried to sabotage me in any way. I couldn't take that and many other things anymore, so I left the company. The most tragic part is, that my software could become a massive foundation for the company, but after I left they abandoned it. I still had some good contacts within the old company and they said, that the senior dev told everyone how bad everything was, that I have done through the years and that they can't even describe how bad the architecture of the software is. tl;dr fuck off!! I've done so much things for the company and they never appreciated it. I'm glad I quit that job. Best decision ever!!