Overly Critical BF

My partner and I have been dating for less than 90 days and I can already see that there are big differences in how we approach relationships and general communication. His approach is to critique me when I do things that he would not do (example: I don't always flush my urine after each bathroom visit in effort to conserve water; I don't always use correct grammar, especially when in relaxed settings; I make conversation with strangers in grocery lines to pass the time, etc.). Granted, I am naturally a sensitive person who would rather receive constructive feedback instead of critiques, so I do not fret each time he offers criticism. My concern, however, is that I am beginning to feel like I cannot do anything right in his eyes because he criticizes my behaviors more frequently. We had lunch together today, and within 20 minutes he had offered more critiques than I was prepared to receive and it really brought down my mood. I have shared with him that I would like to find a better way for us to communicate, but he reminds me that "his critiques are part of his communication style and he will not change".

I feel like this issue will continue to be a sore spot with us, especially considering that he has said that he will not change. It seems best that I leave this relationship because we are incompatible. I fear that if I stay, the long term effects of his critiques will have a negative impact on my emotional well being. Has anyone had an experience like this before?