Do I have to eat Matzah for the whole chag what if I don’t want any for a day or two?
You are required to eat Matzah during Yom Tov at the night meal and a day meal. You are not required to eat Matzah during Chol Hamoed unless its Shabbat.
On both Shabbat and Yom Tov there is a requirement of Lechem Mishneh which is making the bracha on two whole loaves of bread during the year or two whole matzahs on Pesach.