If OOP is over-complicating your code, you're using it wrong. OOP is a tool to manage complexity.
Functional programming, in my experience, created much more complicated code because it seems like the authors like to be a clever as possible.
Functional programming, in my experience, created much more complicated code because it seems like the authors like to be a clever as possible.
But granted it needs to be part of a broader pressure to keep things simple, otherwise devs will like you say, find a way to overcomplicate.
One can mix functional and OOP code well by compartmentalizing the parts of the code that are in OOP style, and situating it in an overall functional context. For example, the methods of a class can certainly be written in a very functional style, and classes themselves can be instantiated within functions.
The mark of a skilled developer is to know which paradigm is the best to solve a particular problem, just like the choice of a data structure can greatly affect simplicity of code to address a problem.
What kinds of problems, if I may ask?