What would you say...

Ok so I broke up with my ex 4 months ago. And he's going through a rough time and I'm still there for him . but one thing that bothers me is when I logged into Facebook I saw that he had a picture of another girl on his wallpaper and I told him yo take it down. Because when we were together he would never post pictures of us on his fb. Only on his insagram and even he deleted those. Like he didn't want anyone to know so I told him to take it down and delete her picture. And she has his picture as a background on her fb..... He deleted the pic and took it down. I didn't say anything to him. Then he has the nerves to say "You made a big deal about the picture and u can't even say thank you that I took it down" ..... I feel like cursing him out. I honestly don't know what to say.... Because the bitch still has his picture up. What would u say to something like this ??