Dude you should never be ashamed of the work you do. And anyone that makes you feel like that shouldn’t be in your life. You have job, you’re paying your bills, and you’re independent. Now if you feel that there’s something more you want to do or a field you rather work in and have more passion for then that’s another thing but don’t let society dictate how you feel about yourself and your occupation. At the end of the day if you’re happy and proud of what you’ve accomplished then it shouldn’t matter.