I was seeing it that you were able to take your stance fairly and then the bramble branch impeded your backswing. If that's not the way it was and I have misread the scene, that just shows how wise rulefan was to avoid committing himself!
You can touch, bend and even break things in "fairly taking your stance". You may not bend and break things to make room for your backswing or stroke. If you read through Decision 13-2/1 from which rulefan quotes you will see this distinction illustrated.
In the end if the bramble or gorse or whatever sharp and prickly growth is threatening you is that bad, you may have to deem your ball unplayable. As long as you can identify the ball in the jungle, you can leave it and substitute another one.
no wonder the rules and their interpretation can be so confusing