It sounds like your mangoes weren't fully ripe. Before cutting a mango, you should check to make sure it feels slightly soft. The hard ones taste bitter because they haven't ripened yet. This is a common problem with imported mangoes sold in grocery stores. In tropical countries like Brazil and India, they are picked ripe and eaten immediately. For import however, they are usually picked unripe so that they will not spoil on the way to the United States or elsewhere.
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maybe they are are decayed or rotten
i hope you havent tasted any such!!!!
It sounds like your mangoes weren't fully ripe. Before cutting a mango, you should check to make sure it feels slightly soft. The hard ones taste bitter because they haven't ripened yet. This is a common problem with imported mangoes sold in grocery stores. In tropical countries like Brazil and India, they are picked ripe and eaten immediately. For import however, they are usually picked unripe so that they will not spoil on the way to the United States or elsewhere.