I've felt the same at some points in my career, working very hard but feeling like I'm running just to keep in place. Maybe your problem is you are the "sole d

I've felt the same at some points in my career, working very hard but feeling like I'm running just to keep in place. Maybe your problem is you are the "sole developer for Mobile and Web". It just takes a lot of work to get everything working in JavaScript and HTML and all them frameworks without any real insights being gained while doing it. There are too many ways things can get out of whack it is like a house of cards where there are too many undeclared dependencies between parts of the application. Web-tech is to blame there are few general design principles, just tech that has evolved to whatever is needed for you to "hack". Too many details to get it right, even to get CSS to look great. Perhaps you should get more developers to take part in your efforts then you don't have to work so many hours and it will be more fun to have a team.