lol at those pics.
I think the 90s was the worst decade in comics, but for a different reason than what you said. We all know the story of the 90s boom and bust that is still affecting comics to this day. There are reasons for that, and what you mentioned is definitely a factor. Where the 90s really hurt comics though was in crippling the indie market so much that it's damn near impossible to get into the business independently. It's always been hard, but in a shrinking niche market indies suffer much more than anyone else.
When comics were booming, you had a larger audience to target and sell to. You may not have the same success as Marvel or DC, but there was still plenty of room to be profitable. Now you really have all of the regular odds going against you when running a business and you have to deal with a small market that doesn't respond well to new characters.
The reason why this is huge is because it stagnates the pool of creators. There are only so many slots(heh, Dan Slott) available to creators that editorial has to really pick and choose carefully who to put on titles. There still are many who would love to write or do art, but many might be discouraged from going the indie route to make their way to the big two. They also could be trying to get out their dream but are defeated by the industry.
I've seen some really talented people have to give up their comics dream because they weren't making enough to be profitable. I'm talking about some truly talented people as well who might have sold if the industry were bigger. The 90s crash(lol blame it on CrashnBurn

) really hurt a lot of aspiring people because there's only so much room for creators nowadays.