For me it'll be Steins;Gate - Zero.
I waited to watch it for quite some time but now that they have released it, it just doesn't feel so good.
Houin Kyouma is acting more like a sad, crying and irritating main character in this series than anything else.
They removed the key aspects which made fans love Kyouma in this season.
So that's the one I was excited to watch but when it arrived, it seemed like my expectations were too high.