James! Hi.
Games can disappoint for any number of reasons.
Fable games disappointed because, paired with Mr. Molyneux's embellishments, many people in the fandom superimposed what they hoped for onto what they expected and were left feeling a kind of way after that. I'm guilty of it too. Fable releases were playable products though. It wasn't like Skyrim where you bought it, installed it, waited for an update and then played it.
Cyberpunk's rollout wasn't just disastrous. It was a cascading catastrophic failure broadcast to the entire world. A game in development that long doesn't have an excuse to be so atrociously broken. Development started in a time when the One Ring could have been destroyed and wasn't. Hyped up by John Wick. Based on beloved classics. Release dates had been pushed repeatedly so that the end product could be something good. This sets the expectation that the end product would be something good. It was not. Not just a bad (by some accounts) game, but broken (by most accounts). An incredible show, for sure.