I understand that it’s not fun for you like that, but you’re missing the point of Remix, everything is sped up, even the NPCs tell you so a few times, making remarks about “moving along” and “not having time”, and most players doing Remix want it fast. It’s suppose to be fast so you get to max lvl fast and start collecting bronze and ip from the raids or m+, because it’s a collecting event more than anything. Fun is subjective and it’s not necessarily on the menu here, for most it’s grind and collect.
Btw you can join raids on lower lvl too, there are people who will take you, but the experience will be the same, no one is waiting around or ressing you, you just get xp and lvl faster.
I’ve tried as tank, as you suggest, to wait for “the little guy” in my group to get to the boss, and not run too fast. Some groups are okey and behave, but most times while I am waiting some other dps pulls the boss.
Also, just so you know, it’s not always the tank going ahead, you assume it’s the tank the one ahead but sometimes it’s just another dps, I’ve even seen them queue as tanks but they are in dps spec. Even the ones in healer role do it, I had a druid in heal spec queued, run ahead as boomie and pull everything.
All in all, Remix is just not made for conventional pace and roles. As the other reply said, if you want slower, either make groups in LFG looking for likeminded people to queue together with; or if your goal is just lvling with rdf, and don’t care for the collecting in Remix, then don’t play Remix, just play regular retail. There is an xp buff over there too right now from the anniversary event, that can help you level faster but not as fast as the dungeons being run down in Remix.