I agree with Mirch, if she’s comparing you to other SILs then she probably does the same with them.. it’s the perfect way to get her DILs to go crazy trying to impress her. If you feel your mil is not the kind who you can be friends with then treat her formally and ignore her complaints and rants. Be respectful but don’t let her get to you. If she has been hard to please all this while then the truth is, that’s how it will always remain.
Great tips on this page.. but remember, don’t overdo anything or kill yourself trying to please them. If she can’t appreciate what you do for her then she doesn’t really deserve it all.