This game is forcing me to speed run, more and more

[Nicobo]

Speed runs are generally done by pulling all mandatory trash up to a boss, AoEing it down, killing the boss, and repeating until you're done. If you have the gear for it, it greatly speeds up dungeon runs. Alternatively you can avoid much of the trash either by simply not aggroing it, leashing it somehow (see the teleporter in Prae), or sac pulling.

In 1.0, there actually were rewards for completing the dungeon under a certain amount of time. These were removed in 2.0.

Thanks for telling me 1.0 had it and the concrete description for SR, so now I am quite sure a lot of "speed run" problems were actually just playing inappropriately but not really a speed run.