Fenerbahce finally got a cup, and Jorge Jesus resigned right after the game as well. Kudos to them, they really deserved it, in fact having 80 points in a single season is normally a championship level points as well, so Fenerbahce actually had a great season, with 80 points and a cup but Galatasaray was better because they had 88, on the other hand Fener was doing very well at Europa as well to be fair and lost to eventual champions on aggregate, won one of the games as well.
If the league was played over 34 games, what you said would be correct, but there were 19 teams in the league and 2 more games were played than normal. Considering the 2 wins given by decision, the teams gained 6 points more. So 80 points isn't very high. For example, the years when Beşiktaş won the league with 77 and 79 points in the league played over 34 matches were an important domination. After that, since the number of teams in the league is constantly played, a healthy evaluation cannot be made.
Next year, the league will be played with 20 teams again, so we will watch for 38 weeks. Therefore, the point scale for the championship will still be above 80. If the teams have a championship claim, they must win at least 25 matches and not be defeated by their direct opponents.