In my experience, typically researchers only publish the relevant and/or core algorithms of their research. If you would like, you can always publish the code to Github (if it isn't already), and reference it in your paper.

If it is too much work to refactor the code for publishing, you can also just publish pseudocode.

I don't think anyone will nitpick or criticize coding style or things like that unless it is particularly egregious (ie naming variables something vulgar etc). The point of research papers is to communicate new and valuable findings. If people in this conference or journal are nitpicking things like that, you may want to find a different place to submit your work.

I don't know what your field is, but in Computer Science I can't say I have ever known people to consider their code a competitive advantage. The only time they might shy from releasing code is when they think they can commercialize it or something.