It wasn't bad but it wasn't good.
Marvel clearly wasn't the "golden child" of the 60s anymore. Lee's "everybody let's just be friends" attitude ended up with a lot of mediocre writer-editors on senior positions doing bad comics if not working at all. Money was being wasted. Talent was basically sending pages high off LSD and sometimes forgot to deliver at all.
Shooter came in as the replacement for a drama bomb on the bullpen, then slowly started to put a healthier work environment. However his top-down and frankly crass atittude when giving orders made a lot of people paranoid about a "shooter purge", so to speak.
Most of the bull pen loved him, make no mistake. The bullpen had it's golden age with shooter - with lee it was just him and 4-5 receptionists. But creators didn't, they were too paranoid of him just cutting them off their pay-per-page jobs to actually realize how many artist benefits he campaigned for.
Enabled Epic under his second in command, can't remember his name. Basically revitalized the post-crumb indie comics scene. Instituted royalties, made more than one person rich.>>117804794
Weisinger's "school" was just verbal abuse that nobody liked. Shooter learned from DC how to handle the back to basics stuff.>>117805748
It's a strange case and nobody who's been credited has ever admitted to writing it.
Shooter has been accused of meddling by tabloids, and to this day there's a bunch of old guard that are the first to talk bullshit
The x-men mess was 100% his fault tho. However, in both his and claremont's defense. The mess was also 100% was made the X-Men such an explosive pop culture fad in the 90s. Out of X-Factor/Grey problem came Inferno, Cable and X-Force