Steve and Rich's comments are spot on. and super typhoon's
I'd add that getting to 100 wins (or whatever) is no guarantee of anything. I'd also say what makes me feel better is to offer the opponent a congratulations, tip the cap, and know that at some point you will be on the other side of it. But I know I never disparage anyone--heck I had a 100+ win team get swept by a team with a losing record. Them's the breaks.
More to the mechanics of it in SOM, it can depend on your intra-division record--ie did you beat up on a really weak division? Did you have a bunch of guys who were injured a lot less than expected? Or guys that had outsized production for their card? Even in real life, this idea that having 100 wins is an entitlement to anything is hogwash--just ask the '69 Orioles...or the Indians in the 50's...or the Yanks in 1960. Plus, it is what makes it fun. (edit--OK the Pirates were only maybe a shockj to spoiled Yankee fans
but you get the point!)
The alternative is we just dictate the outcomes on descriptive stats such as run diff, record, etc--and if you do that, then where do you start?
Well done winning 100+. It is bittersweet but it makes those championships that much more special.