Some people stay in the same job their whole lives. If it suits them and they're happy, then great. I know it's easier said than done, but you don't need to compare yourself to other people, especially with what they post on social media.
I've changed jobs a lot because I find them so difficult. I was employed by one company for almost a decade but switched roles regularly while I was at university. Some jobs I only managed a day - others were a couple of years. The only thing that's consistent is that I get bored and the more people I have to be around, the more difficult I find it.