My dad has abused me and my mum for years. Is it wrong if I don’t invite him to my nikah
In conflicts with your parents, it is always to try to be the “bigger person”, even if they do not deserve something or are acting unreasonable, it is best to treat them as if they are admirable people. However, it can be permissible to not invite a parent to your wedding if they have done something to deserve this, but this is something that only someone very familiar with your situation can decide.
For more articles on similar topics, please see the page dealing with parents in Islam on my site.