Whaaaaaaaaaaat are you talking about?
Tinnerholm had 4 goals / 5 assists in his first season, 1 goal 7 assists the next, 4 goals 4 assists the next, and this season only 3 assists.
Chanot/Callens have scored from corners in crucial games before.
Besides that, please explain to me how a solid backline that doesn't give up goals "doesn't win games" ? The less goals you concede, the more possible it is for you to win with less goals to score. And we have been very good defensively for the most part up until recently. Sure, it's not "going out and winning you games" but how many defenders actively win you games? They usually don't. They defend, which wins you games just as much as forwards do.
GA by year:
2021 so far 7th least (34 in 30 games)
2020 7th least (25 in 23 games)
2019 2nd least (42 in 34 games)
2018 7th least (45 in 34 games)
2017 5th least (43 in 34 games)
We have 4 games left, and unless we concede 8 goals in those 4 games (unlikely the way we've played recently defensively strong) we will have the best defensive record this team has ever seen. That would, usually, indicate a really good season, considering the places we ended up in during those seasons. It's not imo the defense that's the issue this season.
Chanot, Callens, Tinnerholm are very vocal. They're always the first ones at the referee standing up for calls and players.
https://www.mlssoccer.com/news/difference-style-make-nycfc-central-defense-pairing-one-best-mls from 2018.