To be honest, Yes the company as a whole is as much to blame as Wada is. However, Wada is the Captain of the ship. Everything that happens goes through him to give the "Order" to release/make command. The Captain is suppose to be a leader and guide there followers/workers to the path of success!

The game that have failed under his lead was mostly has fault, He could have said about FFXIV 1.0, um.. this needs a lot more work and give a thumbs down! He greenlighted FFXIV 1.0 and it failed ( example).

The leader always takes responsibility for everyone's actions! Wada is a good man and he did bring out some good games. Overall though, It has put SE backs against the wall (despite their deep pockets).