why should you win a game in which every lane looses?
that means 80% of the enemies are doing better than 80%off your team.
If you as a jungler could turn around such a game, wouldn't that mean that jungle has to much impact on the game, as he can compensate 4 players performing bad on his team?
If your teamcomp is clearly better in lategame fights and the enemies fail to close it out, ther might be a comeback chance.
If you overall have a better teamfighting and your team groups to take over dragoncontroll, there might also be a chance.
But in soloQ, you can asume that if your team does poor in every lane, they won't have the confidence to group and take dragons based on the teamcomp.