I added an important caveat, which is that plants need to be in top condition especially the roots. Looking at those photos above you have a good space to work. Looking at the plants the first thing I notice is that the branches are not forming bulbous lower branch nodes, they have a look more of soil than hydro. I think you could get better results with a modification to your hydro set up.
I also notice that you do not appear to have a plan or an evolving plan as to how to prune, it may take a while but you have to trust your plants and your set up and prune branches that experience tells you will underperform. Pruning evolves with the grow. Personally I don't try to bend branches too sideways because most of the action happens on top and you're only releasing weak branches, sometime my grows can look a bit like that but that's only because as the grow progresses and I gradually thin out the plant, I create more space to pull it apart, later on you can bend them even more, but most of this extreme bending happened late not early.