Hi,
I changed jobs several times, even being disabled and living in a developing country. Like you, I think that it is important to feel plenty at work, and, on the other hand, it is important to think about the future, retirement, etc. Lastly, I have discover one more aspect to take into account in addition to our happiness at work and future. This is our abilities and bow we can better impact the world. At this point, you have some expertise, you know how to do certain stuff. by doing that you are helping people and the world to become a better place, to function, etc. Maybe you will not think like that but I am almost sure that everyone can make a difference in this world. That eventually can bring you a sense of fulfillment. but you do not do it because of you want to satisfy yourself, you do it because you want to contribute to something bigger than you. I mean, it can be something to add to your criteria to make a decision, if you like. Hoping the best for you