I am searching for an idiom which means
to have a disadvantage that makes your chances of winning bleak
It should appropriately fit in this analogy:
Head Start - Win
___ - Lose
Noun: 3. Any disadvantage that makes success more difficult:
e.g. "The main handicap of our business is lack of capital."
The main head start of our business is abundant capital.
doesn't make sense. The main advantage of our business is abundant capital.
does make sense, because handicap is the opposite of advantage, not head start.
Commented
Mar 5, 2015 at 17:49
A late start would fit the description.
"John had a head start and so he did very well in the race. Derek had a late start and finished last."
In actual races, it's usually the chest that has to clear the winning line rather than the head, but if we're sticking with "named body parts" relevant to one's chances of winning,...
a hamstrung competitor is unlikely to win the race.
hamstring noun - the large tendon at the back of the hock in the hind leg of a horse, etc.
hamstring verb - to cripple by cutting the hamstring of
Depending on the situation, “headwind” could offer an appropriate (and similar-sounding) opposing term. John had a head start and couldn’t lose, Jen had a headwind and couldn’t win.
head·wind or head wind (hĕd′wĭnd′)
n.
A wind blowing directly against the course of a moving object, such as an aircraft, bird, or runner.
(Informal) A source of resistance, as to progress or success.
A lot of good answers here, but you might consider using “setback.”
Per Merriam-Webster:
setback, n.: a problem that makes progress more difficult or success less likely
Source: http://www.merriam-webster.com/dictionary/setback
This might serve well for your analogy pairs:
Head Start – Win
Setback – Lose
As suggested by Marv, “handicap” also seems like a suitable candidate. I suppose the choice might come down to nuance, in that “handicap” might suggest a personal, characteristic, or genetic encumbrance or hindrance whereas “setback” might imply a difficulty caused by external factors. Also, if matching the temporal aspect of head start is important, “handicap” is probably a more apt choice since it evokes the idea of an existing impediment at the onset (of a race, for example), whereas a setback could occur at any time.
Slow off the line.
About the closest I can come up with.
or just 'slow to start'
"Starting on the back foot" might be what you're looking for.
http://www.collinsdictionary.com/dictionary/english/on-the-back-foot
on the back foot
Definitions: at a disadvantage; outmanoeuvred or outclassed by an opponent
A long shot:
a competitor, as in a race, considered to be unlikely to win
an undertaking, guess, or possibility with little chance of success
A head start (likely to win), a long shot ( likely to lose) .
(TFD)
Left Behind would somewhat provide an equivalent opposite of Head Start and also linguistically match...
Slow Coach
My interpretation of the question assumes we are talking about a speed race, either figuratively or literally. I should add that I am English so my idiom will be English and may not translate into other languages well. To explain: many years ago a marketing guy told me the bus component of their computer was being dubbed the "Express Bus" and could I think what to call it's polar opposite, so they could knock the competition with it. After some thought I replied "Slow Coach!" Definitely the best answer in that application, and at a squeek, it might work for you too.
With a head start you'll win. Stall-out and you'll lose.
Head Start: Win
Stall-Out: Lose
See also, stalled out of the gate.
(I can find no link for this phrase and I cannot find the colloquial definition of stalled out. I.e., I was going to ask her number but I stalled out. -please feel free to edit)
The tightest antonym in my opinion is simply slow start.
We had a head start.
versus
We had a slow/bad/rough start.
but the other answers could be expressive depending on your application.
To use a more literal racing analogy, you could say that someone "broke poorly," which is apparently a horse racing term meaning to be slow out of the gate.
Willingly taking on a disadvantage or handicap in order to provide a 'more fair' competition is often referred to as Sandbagging.
"Dead last" or "Tail end" would be satisfactory phrases.
Head Start - Win
Burden - Lose
noun
- a load, especially a heavy one.
In the proposed use burden is used metaphorically, so it is not an idiom, although both idioms and metaphors are figures of speech.
Note: I've edited my previous answer, which I had deleted, rather than submitting a new one because I don't see a way to submit a new answer (though I have more than 10 points, so I don't understand that).