Simply by virtue of being a popular comic book writer, he (and many other writers) gets lumped in with "Them."
Well, that, and the fact that he's already admitted flat-out, in countless interviews, to letting his own personal grudges and biases determine his work - at least when he was writing Animal Man, he was more up-front about it, since he actually told Buddy Baker, on the page, that he killed off Buddy's wife because he was sad about his own cat dying.
If that's your position, it's your position and you're entitled to it, but I think it's profoundly unfair to any creative personnel. It sounds like you're slugging it out with ANY writer based on other writers.
Yes, it is unfair, because fuck fair, because when you're making money by telling stories about other people's characters, especially when many of those original creators wound up getting fucked over hardcore by the companies that you're collecting your paychecks from, then you're already in a realm of "unfair" to begin with. If you don't want your work as a writer judged negatively against the work of other writers on the same characters, then you either need to suck it up or start telling characters about your own characters. Whatever my opinions of Seaguy, I can't ever fault Grant Morrison for failing to live up to the standards set by a different writer on that same character.
Based on that opinion, I don't see what any writer can do to appease you other than write exceedingly respectful new characters who always play nice with Batman and co.
You're confusing absolutes with degrees. There are ways to make new characters within the worlds of previously established characters, who are not necessarily beholden to those previous characters, and make them work WELL, but contrary to what far too many writers think, it's NOT by trying to impress us with how much BETTER they are, than what's come before. The new Blue Beetle worked so well, not because the writers tried to sell him as BETTER than Ted Kord, but rather, because in so many ways, they simply made him COMPLETELY DIFFERENT from Ted Kord (and, ironically, enough, I wound up liking him BETTER than Ted, whom I STILL like, precisely BECAUSE the writers didn't try to make me like Jaime better). And if you really care about "good drama," THAT'S a MUCH better way of doing it, rather than having an endless succession of characters trying to be more EXTREME and SUPERIOR in a title role that, like Robin, has actually remained rather static in its implied duties and responsibilities (yes, even with Jason and Damian). THAT'S the TRULY NEW way of doing things.