You can use LLMs to check grammar and style and manually go through each suggested correction; it will take more time, but your readers will appreciate the effort and your own voice and style will be there. People get upset by LLM-generated content not because they are against LLMs, but because of the awkward style that is very recognizable and leaves you wondering "If the author couldn't be bothered to write it, why should I bother to read it?"