nieudacznik in English:

You can't expect much from a lame duck.

The government should not spend money on helping lame ducks.

He is a good loser.

How long are you going to be seeing that loser of a boyfriend?

someone who is never successful in life, work, or relationships: What a loser!

If you lose competition you are a loser.

The loser will be out of the tournament.

If you don't want to be a loser you need to change the way you think.

I'm a real loser in English.

If you gamble on the stock market, you are an investor... If you gamble on the derivatives market, you are a trader... If you gamble at the casino, you are a loser... Morality?

I trust that, in the long run, I will not be a loser.

If the loser smiled the winner will lose the thrill of victory.

The project was a loser from the start.