Shooter was criticized for radical reworkings of several iconic Marvel heroes, including temporarily replacing Captain America, Iron Man and Thor with new men behind the masks and changing Spider-Man's familiar red-and-blue costume to a black-and-white suit.
Also,
Shooter angered and alienated a number of creators by insisting on strong editorial control and strict adherence to deadlines.
Shooter himself scripted the 12-part limited series Secret Wars which set records at the time for comic book sales. Secret Wars was criticized by some as an over-hyped series that served no purpose other than to bring together all the company's major characters for no good reason, and also simply to promote a new line of Marvel action figures, but was praised by others as having well earned its place atop the charts.
It also treated the existing X-Men characters like dirt, broke up Colossus and Shadowcat, put Xavier back in a wheelchair to keep his more traditional appearance in place despite having recently regained the use of his legs, and generally mismanaged the mutants so that the Avengers could fight Doom and others while occasionally have other fights with the X-Men "for reasons".
Stan Lee wrote that?
Jim Shooter amongst others;
https://marvel.fandom.com/wiki/Avengers_Vol_1_200
Who isn't the most liked person in Marvel comics
https://marvel.fandom.com/wiki/Jim_Shooter#Criticism
Also,
It also treated the existing X-Men characters like dirt, broke up Colossus and Shadowcat, put Xavier back in a wheelchair to keep his more traditional appearance in place despite having recently regained the use of his legs, and generally mismanaged the mutants so that the Avengers could fight Doom and others while occasionally have other fights with the X-Men "for reasons".
Ah, fuck. Secret War 1 was horrible at times for those reasons you outlined and it's almost unanimously blamed on Shooter. Rightly so, too.