My mom lived in her house for years before she married her new DH..and the D is not for dear..... she has gardened all her life. He doesn't like what she has done, so he constantly cuts down, kills and digs up her plants. He completely demolished her Wiegalia that the hummingbirds loved, even after being told to leave it alone! but he thinks he knows better..... I hope she kicks him to the curb soon.... but not just because of that. That would be rash, it's because he abuses her and is a doped up alcoholic!!! If you knew my mom you'd wonder how she came to be here. She doesn't use drugs, smoke and only rarely drinks. She was a librarian for years and loves animals, gardens and art. But, it is amazing what the fear of being alone mixed with low self-esteem can do to a person.
My DH and I do butt heads on projects.... but we usually find some kind of compromise. Sometimes it just comes down to who makes the better case. I think couples need to talk about the things that bother them.... sometimes it really doesn't occur to the other how bad it makes them feel. Sometimes it's blatent... like in the case if my mother... but if that's the case, there's probably more to it than just that.
Best of luck to you with your DH. Maybe he just thinks he's doing you a favor and argues about it being "right" because he thinks you're just being stubborn. Maybe you get him to realize what you've explained to us. Maybe he can even find the time to help you learn all those little tips and tricks that he knows. Communication is paramount! Good luck!!!