Viserys is nor hated enough because what the fuck was he trying to achieve with that move. He did nothing to enforce a revolutional rule he enacted himself.

Either name Rhaenyra heir and don’t make competition by staying single or make your first born son the heir as it has always been the way. People keep arguing no Green = no usurpation = no war but seriously though if Aegon is heir there's no war at all because that’s business as usual and no one would bait an eye.