Am I wrong to not feel comfortable or think i was taken advantage of around certian family members and others?

When I was younger, I was sent to visit my grandparents. I've come to dread the morning and nightly routine over there. My grandfather would walk me through the brushing my teeth, and taking a bath and everything. I felt uncomfortable being naked in front of him. Same thing before bed he would always have a reason to be in the bathroom while I was taking a bath. I hated it, but didn't say anything because he is my grandfather. So this has been going on since I was really little up until the last time I visited when I was 12. The last time I visited, My grandparents told me to take a bath, and so I did. Because I didn't use the towel they laid out to wash with, they didn't believe that I took a bath. I remember showing my wet hair even. So I was brought back in the bathroom and stripped down, and they gave me a bath like I was 3 years old. It was so humiliating. I could understand if I was like 4, but I've been bathing myself at home for years. Am I wrong for feeling violated?