Is it a bad thing that I don't want my in-laws to stay at our house again?
That might cause problems. Why don't you like your in-laws?
My mother-in-law is too annoying, she's always telling me how to raise my son.
It's understandable to be frustrated by having your in-laws staying at your home. However, they are the family of your spouse and you need to do your best to be a good host for them and to treat them well since they are your guests.
Not this time.
You should just let them in and try your best to get along. It might cause problems with your wife if you don't allow it. I get that it might be tough but its only for a short while.