To an extent, you are correct: many countries participate in the cyber-spy/cyber-espionage game. Where, perhaps, you are incorrect is that this is normal. The GRU has lead exceptionally aggressive cyber-attacks on just about everyone, particularly Estonia and Ukraine.
If you're interested in this topic, I'd like to suggest the wondeful (and terrifying) book, Sandworm (https://www.amazon.com/Sandworm-Cyberwar-Kremlins-Dangerous-...) by Andy Greenberg.