I’ve realised how delusional I am

So, recently I worked at the job as a Social Media Marketer. The job was kinda okay, with some minor exceptions, but at some point I just realised I want to do something more meaningful. That’s why now I’m working at my local department. I earn less, but most importantly I didn’t get the feeling I wanted. I was a bit crushed when I saw how careless everyone around are here and how minuscule my impact really is. And on my session with the therapist we realised that a lot of this is caused by my expectations which were very different from the real experience. Now I don’t know what to do. I have some idea that it might be better later, when I progress in my career. That way I hope to get enough power to enforce more efficient and really useful work. But the funny thing is that I think it’s also one of my delusions.

Anybody is familiar with this? How do you cope?