That's not that bad of a disadvantage tbh. It's possible to make a comeback unless you have a completely shit team comp without cc and you notice your opponents aren't bad enough to fall for split pushing.Seriously, I hate how some people go "an eye for an eye" to "spite" trolls while forgetting the two aren't the only people playing, which is giving trolls exactly what they're after in the first place and only results in pissing the rest of the team off, possibly resulting in a negative feedback loop where they "get back" at others in later games to vent their frustration using similar toxic behavior.
Being three towers, a dragon and ten kills behind at minute 20 with no one in the team having any decent items yet kind of fits my definition of miserable. Even support Sona could go harass our laners with relative impunity, which was hilarious.
Remember that it's always possible to throw in solo queue.