The word 'overindulgence' is correct and usable in written English.
You can use it when you wish to describe someone having excessively indulged in something, usually as a negative. For example, "Her overindulgence in junk food has led to her health suffering."
Dictionary
overindulgence
noun
An act of overindulging; indulgence in too much; pleasure or consumption taken in excess of what is satisfying or necessary.
synonyms
Exact(60)
The hospital, based in the heart of the city, is usually the first to deal with the overindulgence of the city centre's revellers, and paramedics waiting for callouts in the ambulance bays are apprehensive about the night ahead.
Modern life, argues Mr Thompson, is overwhelming the clever bits and overstimulating the more primitive functions that encourage overindulgence.
And what is now of concern disease caused by overindulgence in food, alcohol and tobacco, and injuries caused by rapidly growing traffic and, in some places, a culture of casual violence is not susceptible to prevention by medical means.Road traffic, for example, requires action from planners, transport agencies and carmakers, not doctors or even officials from the health ministry.
Yet she also notes some negative cultural connotations: that the treacherous substance can symbolise overindulgence is just one.
Nor can he be the only one who is happy to love his family unquestioningly at every other time of the year except Christmas, when enforced proximity and overindulgence raise blood pressure to hazardous levels.By contrast, Tokyo does it broadly right.
Ever since Aristotle first warned about the perils of overindulgence, there has been a strain of thought that the moral life is the ascetic one.
Popular legend attributes his death (on a riverboat on the Xiang River) to overindulgence in food and wine after a 10-day fast.
There he sits at the Department of Health, ever more conscious of the nation's descent into crapulous overindulgence and yet uneasily aware of the responsibility enjoined on all Conservative governments to suck up to the brewers and the big food companies.
All the same it would be a pity if the current form of overindulgence – too much sitting on your arse and looking at your phone – came to define the class of 2015.
An evening of overindulgence can often end with drunken boasts, flights of fancy and grandiose business plans for global domination.
In Mann's novel, the vitality and the solid businesslike virtues of the Buddenbrook family are sapped by introspection, homosexuality, loss of interest in commerce, overindulgence in art, and illness.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com