If you are disenchanted with something, you are disappointed with it and no longer believe that it is good or worthwhile. I'm disenchanted with the state of British theatre at the moment. = disillusioned. disappointed with someone or something, and no longer believing that they are good = disillusioned disenchanted with
Disenchantment is the feeling of being disappointed with something, and no longer believing that it is good or worthwhile. There's growing disenchantment with the Government. = disillusionment