Why do people tend to force their opinions on you? Or like know it "better"? How do you deal with them?

The last days I have noticed that my family and one friend, they can't seem to except my No for an answer.

Like simple decisions about MY apartment are somehow their business... for example, one tells me "You need a microwave" and I thanked her and said No, not now.. she literally argued with me for like 5 mins, why I do need one.

Or my aunt and mom don't like the place where I wanna put my sofa... this ended with them calling me stupid for not trusting their well experienced opinion.

I'm literally constantly arguing and having fights with them (and this already since years, but just noticed it even more)
I'm so exhausted and started to just say mhmm sure.
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+1 y
Look I don't give in. Like I'm not going to do what they tell me to do. It's MY decision! It's just getting really exhausting to argue and fight with them all the time and being insulted for something so simple. I just can't understand them.
Why do people tend to force their opinions on you? Or like know it "better"? How do you deal with them?
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