This may not be what you want to hear but it sounds like your mom is doing her best. She wants to talk you out of paranoid thoughts because she’s worried about you but she also wants you to feel safe (hence the extra locks). I don’t really want to wade into an argument that I didn’t witness.
But that aside, from your last comment, it sounds like you want your mom to be perfect and exactly what you need. Unfortunately, moms are flawed people just like us. My mom loves me and does everything she can for me but sometimes she just doesn’t get it exactly right. She says the wrong thing or does something less than helpful.
At the end of the day, I just try to be forgiving and remember that she’s a person. And if I can be an incredibly flawed daughter and she can still be there for me and love me, then I should return that by forgiving/accepting her when she falls short of what I need her to be.