Eh. Sounds like it could be very toxic, or just whiny worker bees, we can't tell from the outside.

If the senior folk are basically tenured and produce very little while still holding the reins and preventing upwards movement of the high performers, that's toxic. Basically a rug pull because they got theirs and limit the opportunities for the next generation.

It's also entirely likely that they're doing the work at a level that doesn't include implementing the actual day to day, but the low level workers don't see it, so make bad assumptions.

Who the fuck knows what the reality is.