flickerlust
can be defined as a feeling of excitement or anticipation towards a movie, TV show, or other media, which quickly fades away over time, leaving the individual feeling disinterested or uninspired. It's the initial attraction followed by a lack of follow-through or lasting interest.
"I had such high hopes for that new Netflix series, but it turned out to be a case of flickerlust - I added it to my list, but every time I saw it, I felt less and less interested."