Very timely for me as well, have been having tough time with my partner especially about how unfriendly and critical I sound, even though my intentions are for general improvement and well being around home.
There is little less welcome than unsolicited "advice", especially coming from the person and place that are supposed to be the refuge from all the shit going on in the world.
A long-term partner probably knows you better than anyone. No one likes getting called out on their stuff, if you want to grow as a person or as a couple you’re going to move past that initial discomfort, reflect on it and then decide if it’s valid enough feedback to try to integrate it.