What is what bothers you most about the current situation? Is is that you feel you haven't learned enough for yourself and want to getter a better understanding

What is what bothers you most about the current situation? Is is that you feel you haven't learned enough for yourself and want to getter a better understanding how other domains work? Or is there are fear that you are missing out on some interesting career opportunities? If it's the latter than I can tell you with high confidence that you are not missing much there. Most companies need CRUD apps, simple Frontend apps, etc., and there is a high demand for engineers with the relevant skills and therefore also salaries are fine. Building OSes, compilers, embedded devices, networking stacks is super interesting, but there isn't that high of a demand since it's rarely what drives business. Therefore even if the topics are sometimes more complicated, they aren't payed that different.