I don't think you need that, but you do need to realize a few things:
1. The DIS is an incredibly small teeny tiny sample of the tens of millions of people who go to WDW every year. And the people on the DIS who complain are an additional small sample of that. So when you read a bunch of "I hated this" about WDW posts, realize that it's a handful of people out of a handful of people out of millions. When you were with CRO, if two people in a row called and were hard to deal with, curt, pushy, demanding ... did you pick up the next call assuming that everyone else would be like that too? Of course not. You took each call as a new and unique opportunity to help someone plan a wonderful Disney vacation. So when you read a few people complaining, don't assume everyone is. Go a few topics down and read about great character interactions or "What brings you back to Disney?" You'll see that there is truly more positive here than negative.
2. It is human nature to spend more time complaining about something than complimenting something. How many of those "I've lost the magic" posts talk about one or two instances of a larger vacation that, for all we know, went just as it should have. People will ALWAYS talk about the one bad thing that happened more than the 452 good things. And they will spend more time, more drama and more emotion on the one bad thing, because what they're looking for is a place to vent. And look at their signatures. If they just spent four vitrolic posts venting about free dining or Starbucks on Main Street, and their signature reads "Only 9 months till our magical
Disney cruise" or "Only three weeks to our surprise weekend trip to WDW", they probably don't feel as all-encompassingly negative as they may seem.
3. People can hate a specific situation but still love Disney. Don't confuse a momentary tirade with total disengagement.
4. Posts about how people are losing the magic or how they hate WDW are usually very clearly marked. It's pretty easy to tell from the title -- and if not the title, the opening post -- whether it's going to be a complaining, negative thread. So if you don't want to read that kind of post,
don't! Why are you sitting and reading about the negative stuff and then getting upset because you're reading so much negative stuff?

Simply bypass the posts that are clearly negative and move onto the ones about "My Awesome Pick a Pearl Experience" or "Things that are free at Disney" or "Both coasts in one week!"
In all honesty, the DIS isn't making you feel bad. You're kind of sabatoging yourself.
You can choose what to read and what to skip, and for some reason you're choosing to read the negative stuff. Stop that, and you'll be much happier! You can't control what other people say or feel, but you CAN control how you react to it.