Are you sure that you have never won even once? The statement of "the house always win" applies for those who desperate in their gambling journey. It can be due to bad money management and bad self control. To be frank, I do not believe if you have never won even once. There must be a time when you won some but you could not stop so you lost it all eventually.
So in the end or if generalizing he never won any as he lost it back and ended the day without anything in he bankroll right?
Indeed all gamblers experienced winning that's the very reason greed and addiction take place and start to manage gamblers mindsets, the urge of feeling the winning and the enjoyment that they feel each time they've got the taste of multiplying/growing their bankroll.
Sad but at the end if that certain gambler don't have any control, the statement house always wins continue to rule.