When a player gets stuck at a certain level despite trying to get out of it, spending a ridiculous amount of time for no return and getting frustrated af.
"Hardstuck" is a term commonly used in the game "League Of Legends". It means that someone cannot get up the rankingladden and is stuck in at a certain rank. He cant get up and is simply a nub with not the skill level required to rank up.
Example 1: Yo that dude is hardstuck bronze 5.
Example 2: Man you were hardstuck silver 3 last season, how did you get platinum this season you boosted bonobo.