If you are looking for a word to describe this feeling, I might use the word, DEMORALIZED which means corrupted. For example, you could say, "The experience left me demoralized. I felt crushed and disheartened because of what happened". Some other good words might be, DESPAIR, which means being without hope or ANGUISH which means heartbroken. You could say, "Something happened to me recently that left me feeling a great deal of despair". Something happened recently that caused me a lot of anguish. Hope this helps

I would use the following Something that happened and negatively influenced on my morale ... made me feel weak, unsatisfied, unhappy .....

How about: Something happened to me recently which has made me feel weak, unsatisfied and unhappy. I don't think you need negative influence, as "weak...etc" is already clearly negative. And I don't quite see how "morally" fits in...

Hello