Yes, that’s just the group, but there are always stuff you can do.
With a well timed AMS you can have the toxins drop (it both soaks their damage and forbids new ones from sticking). Between that and DRW parrying everything, you can guarantee a lot of time without taking stacks.
It’s important to keep in mind when things aren’t your fault - adds should definitely die far earlier than 70 stacks, because that’ll kill even tanks with more mitigation. But it’s equally important to be aware of how you can help when the group isn’t very good.
We have enough CC to be self-sufficient for most of RLP.
You’re not grabbing Death’s Echo - that’s two Death Grips, and you can interrupt stuff with death grips (also Death’s Echo is one of the best talents we have due to higher DnD uptime, specially now that it’s been buffed, definitely check it out!).
Permafrost is good, but Blinding Sleet on the other side is an AoE disorient - you can interrupt entire groups with it (also works any time you need just a little breathing room, most mobs will stop attacking for 1-3 seconds when you use it, depending on RNG).
Asphyxiate is a long single target stun. If you expect your group to not be good at interrupting, it’s extremely valuable.
Between slappy hands, sleet, and grips, you, as a BDK, can handle most “interrupts” in RLP on your own. They’ve changed how casts work - in the past, anything other than interrupt would only give a small breathing room as they’d resume casting on the first opportunity. This time around, stuns and displacements that stop the cast will actually make it enter the CD period as if it was properly interrupted.