Im a plat player playing on my gold 5 account
here's an example of a game that is 100% without a doubt impossible to carry, for anyone. Ryze dies level 1 to Jayce, panth dies shortly after to leblanc mid (ya he picked panth mid before their mid laner was chosen). please keep in mind this is low gold 3-5.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1604478238/211110774
My first death came 20 minutes in.
tttt elo hell isn't real, but these games sure make it feel like it is.