It's weird watching this now knowing Jamie and Adam disliked each other

My understanding is that they not so much disliked each other as just had profoundly different styles, so they didn't work well together.

Its not like they disliked each other. They were just coworkers who had different personalities and did not hang out after work. But were professionally on set. It was pretty obvious to me when I watched. That those 2 are not friends.

Jamie is grumpy person that barely talks to anyone. Adam is fun guy who jokes around. Because Adam knew he was to work for public, that show must be interesting for viewers. So he acted foolishly. Jamie knew it must be done but could not act it out. So he was just in his grumpy state while Adam was working for both of them.

Show would never get this popular if Jamie would host it alone. Because he is boring and personality free. Adam really should get appreciation for his work. And its hard to work around such grumpy guy as Jamie.

I knew that they did not like one another. The show was so interesting that it did not matter.

I always thought they were "frenemies," like they were friends for a while, but often had some friction going on between them, and after 13 years had had enough of each other. Their opposite personalities always made the show interesting. I mean, Jamie is the stoic, mature, quiet, even-thinking one; while Adam's the crazy, energetic, talkative, big kid. Both are very smart and talented, and I loved watching them learn as they went through the series. But I can kinda understand why they eventually ended the show and parted ways.

Mom says that when you get older, the most prominent parts of your personality become amplified. Adam was already in his 30s, while Jamie was middle-aged when the show started. Now both are considered "senior citizens" (though you wouldn't know it with Jamie, he's hardly aged at all, visibly) and Adam's more annoying personality traits probably became amplified, far more than what the editors allowed to show on tv.