Wife asking for divorce for no reasons

I am aged 30 years and got married to a 20 years old girl in January 2020. I am a Government employee who especially comes under frontline employee related to COVID-19. I did not take any dowry etc, but, during the marriage alliance, my father-in-law asked to do marriage by us, In turn, my father has worked out the expenditure to be incurred on marriage, reception, and other arrangements. My father-in-law accepted the proposal and was given 7 lakhs for marriage, reception, and other works. After marriage, being a frontline work during COVID-19 pandemic, I failed to spend more time with my wife due to heavy work. At my home, only me and wife are living. We have no childrens so far. I have explained my job importance from time to time and somehow managed to spend quality time with my wife. I noticed that my wife was very possessive, and she has suicidal tendencies. She committed a suicide attempt twice at my home due to arguments between us. I came to know that, my wife committed a suicide attempt before her marriage also, as her best friend (girl) denied talking with her due to some cold war between them. I have also come to know, that my father-in-law has been prisoned in Jail on an atrocity case and he is on bail period. My father-in-law will not show any respect to me. All this time, I endured and managed myself. But in January 2021, I had a heated argument with my wife and took her to her parent's home and explained the issue to her parents, and requested them to guide her daughter about the importance and management of married life and informed them that I will come back after one week. But to my surprise, my father-in-law did not allow me to come to his home and my wife asked me for divorce. I have asked for the reason, wherein she has stated that a temple priest has stated that our both horoscopes were not matched and she was not interested to come back. I approached the local police station for counseling to my wife's parents and later I sent a legal notice through a lawyer to my wife to come back home. I have also spoken with my wife many times, but she did not convince. Her parents threatened my wife, that they will die if she comes back to my home. Her parents are demanding 7 lakhs money which was given for marriage works, reception and they plan to file a case against my parents and brother on domestic violence. I submit that, for the past 10 years, I am leaving alone in Visakhapatnam and my parents and brothers are leaving in Tirupathi and Bombay. My wife's and her parents are spreading bad rumors about me and abusing me. Can I file defame case against them? I don't want a divorce, if it is inevitable, can I get divorced without paying maintenance to my wife. Please guide me.