Despite his mother and older sister being an influential figure in his early chess development, Bobby was fiercely misogynistic and despised women. Despite knowing that his mother was Jewish and his father may have been also, he was an outspoken anti-semite. Bobby's life is full of contradictions. First and foremost, Bobby was insecure. All his mental and psychological troubles stemmed from this insecurity. Even early in his life (pre-1972) it was evident that Bobby was paranoid and suffered a great deal from battling his inner demons. He always felt awkward in social situations around wealthy and educated people because he had dropped out of high school. He always felt an emotional disconnect with people and very few people ever got close enough to Bobby to develop any sort of intimacy with him. He had difficulty trusting others which was a result of his early childhood experiences. He constantly felt inadequate and never believed he was good enough. He searched for money and fame and power not in some ultimate quest to achieve these material things such as status and acceptance but to fill the gaping void in his life of nothingness. He wanted desperately to be world champion to give his life some meaning and purpose, but after winning the world title that desire went away and with the crown came the financial stability and recognition that he was not comfortable with. His achievements however allowed him the flexibility to explore the world and meet with celebrities. Bobby's long break from chess proved to be his undoing. He thrived on instability he had known so long as a chess player battling against the Soviet regime. Once his life assumed some semblance of stability, his mind began to wander, he lost interest in chess, and his previous psychological conditions, which were evident early in his career, consumed him.
Speculation and conjecture, ultimately. Fischer never wrote an autobiography, and I doubt he said any of the above in interviews, so making statements about his inner thoughts as if they are facts is irresponsible. These are educated guesses based on incomplete observations. You could add "seemed to" to everything I highlighted above.
At least it's not UnderwearMisadventure.