Burnout sometimes calls for a situation in which time and effort is invested in something that the reward does not justify.
Life is supposed to be rich
If you did a billion dollars what is another million?
So the level of interest can be smaller and yet the motivation
And the satisfaction of the reward
Many times you can see rich people stop bragging about the amount of money they make and boast more about other things like interesting experiences or contribution to culture or contribution to improving society.
To avoid exhaustion and lack of interest you should always renew your life and explore new topics and do new things.
In marriage, renewal is a very important commodity
Many times in marriage the debts and the amount of investment only increases and the level of interest decreases and it's not that the couple do not "like it" anymore.
The thing is that human nature is renewed to discover and explore.
The solution is first of all to identify the need for constant innovation
The second thing is to reinvent ourselves
In business you can see that companies that survive and continue to be successful are companies and businesses that are always innovating themselves.