Is the wife sinful for complaining about her husband, raising her voice at him, and being repulsed by him, and what is the expiation for that, knowing that the husband does not pray, and she often disagrees with him about matters related to his personal hygiene, in addition to them being physically separated for ten years?

Your question included several matters:

1. Your husband has committed the sin of abandoning prayer. Advise him and warn him of Allah's wrath.

2. Your complaints about your husband to your family, if they involve defaming him or speaking ill of him, constitute backbiting.

3. Your dialogue with your husband should be gentle and calm; raising your voice at him is impolite.

4. Your husband's lack of cleanliness and adornment for you contravenes what is religiously recommended.

5. Financial support (nafaqa) is obligatory upon the husband according to his capacity, as Allah the Almighty says: "Let a man of wealth spend from his wealth, and he whose provision is restricted - let him spend from what Allah has given him. Allah does not burden a soul beyond what He has given it. Allah will bring about ease after hardship." It is not obligatory for a woman to spend from her own money, except as a voluntary act.