If it was summer 2017, and we were looking at a certain Andy Robertson at Hull City, your comment would be saying "He does it all so well his team conceded 80 goals and got relegated" and also probably something along the lines of "he's already 23 and still plays for a team that got relegated"
Bringing up team achievements and trying to make a point with them when trying to analyze a player or judge their talent instantly invalidates everything you say to me, as it's clear you have no idea how good or bad the player in question is.
Btw many players have had great careers that never really kicked off at the age you would except them to. Rodri at 20 was in Villarreal B, Drogba at 24 was in the French second division, Robertson got relegated with Hull at 23, 2 years before he was proclaimed as the best left-back on the planet, Matic himself was playing in Serbia and Slovakia between 18 and 21, then was on loan at Vitesse at 22/23, and then just 3 years later, like you said, one of the best DMs in the world. Development is often not linear, and Berge doesn't even need to become one of the best players in his position for your flawed logic to be proven wrong.