I started odyssey and immediately felt bored because the gameplay was exactly same as Origins, which itself had felt tedious.
The thing I disliked about AC was that there's no variety in the gameplay, it's pretty much the same from start to finish. Games like HZD, GoW, Last of Us, etc. mix things up. There are different types of enemies, varied locations with their own challenges, various weapons which allow different combat styles, etc. AC had the same set of weapons and enemies throughout. Only the part with the ships introduced a little variety, but that also got old pretty quickly.
