Self-destructive behaviour is harmful to the person who behaves in that way.
He had a reckless, self-destructive streak.
self-destructive in British English
(ˌsɛlfdɪˈstrʌktɪv)
adjective
tending to destroy oneself, one's reputation, etc through one's habits or actions
the underlying causes of self-destructive behaviour
He had a reckless, self-destructive streak.
their self-destructive tendencies
There are going to be self-destructive people wherever you go.
self-destructive in American English
(ˈsɛlfdɪˈstrʌktɪv)
adjective
of, having to do with, or causing either damage to or the destruction of oneself or itself
Derived forms
self-destructiveness (ˈself-deˈstructiveness)
noun
Examples of 'self-destructive' in a sentence
self-destructive
Where do you think he has learned his self-destructive behaviour?
The Sun (2014)
What accounted for this self-destructive streak in women?
Christianity Today (2000)
Tackle your self-destructive tendency to go for damaging men.
The Sun (2012)
The real issue is how you can stop this self-destructive behaviour.
The Sun (2015)
And self-destructive behavior carried out in secret generally goes unnoticed.
Herman, Judith Lewis Trauma and Recovery (1992)
If her stepfather goes on helping her out he is colluding in her self-destructive behaviour.
Times, Sunday Times (2007)
His behaviour was seriously self-destructive and risks bringing down his whole family with him.
The Sun (2016)
Double poked through my crispy shell at the sadness that had fuelled an adult life full of self-destructive behaviour.
Times, Sunday Times (2007)
It drives him to self-destructive behaviour.
Times, Sunday Times (2007)
I love her but her self-destructive behaviour is destroying me.
The Sun (2014)
The second is the reckless, destructive and self-destructive way we humans manage the planet.
Times, Sunday Times (2013)
Sometimes this belief is buried and unacknowledged, perhaps showing itself in self-destructive ways.
Pearson, Althea Growing Through Loss and Grief (1994)
This behavior was downright self-destructive, but that was his choice.
Laszlo, John (MD) Understanding Cancer (1987)
They understand where she is coming from but also have made the transition into wanting to stop their self-destructive behaviour and so are positive role models.
Times, Sunday Times (2011)
Suggest she talk with an understanding counsellor about why she's into this self-destructive behaviour.
The Sun (2006)
Right from the opening games of the opening set, he looked almost self-destructive the way he let chances pass him by.