Though often used with a looser meaning (just having plenty of choice, usually considered a good thing), the expression spoiled for choice can be used:
be spoilt/spoiled for choice:
to have so many good things to choose from that you cannot decide which one to choose
• Often, we seem to be spoiled for choice and hampered, even paralysed, by our fear of the unknown.
[Longman]
FumbleFingers on ELL, adds the following quote from the New York Times pointing out the possibility that too much choice can lead to an inability to focus:
There is a famous jam study [which concluded that] in reality, people might find more and more choice to actually be debilitating.