Word for someone who thinks they are doing much better than they are

What is the one word substitution for "one who thinks that he is doing something great but in reality there is no progress in his life"..?


Solution 1:

Delusional

adjective

  1. having false or unrealistic beliefs or opinions
    Senators who think they will get agreement on a comprehensive tax bill are delusional.

  2. (Psychiatry) maintaining fixed false beliefs even when confronted with facts, usually as a result of mental illness
    He was so delusional and paranoid that he thought everybody was conspiring against him.

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