Challenge aside, the problem is simply that the game both plays by it's own rules, and doesn't.
You can play D&D, or you can ignore D&D and use Larian exploits to trivialize many encounters. They simply go too far with extremes when there should be a satisfying middle ground somewhere.
In case of shooting a rope to drop down something lethal on enemies - just add an AC 15 for the rope so it's not a 100% success. And it won't feel like an exploit. There's a rules system in place, and level 1 characters with 8 Dex are not supposed to be able to casually do Legolas style shots. And if you play an archer, it's annoying anyone can do those shots without fail.
The ridiculous jump kills - add an Athletics check to aim the jump instead of just letting anyone jump extreme distances with surgical accuracy. Add appropriate fall damage to the jumper. Give the target a Dex Saving Throw to evade it. Tone the damage to a reasonable amount. Then it's fun and balanced instead of a stupid "I win ha-ha" button that breaks the rules.
And again, self-policing yourself to not using creative exploits because they are too powerful, is not fun.
