I'm mostly disappointed in 0. The show/VN had too many things that don't make any sense.
Why does erasing Kurisu's memory immediately vs hesitating dramatically alter events?
Erasing Kurisu's memories without hesitating sends Okabe to 2036? What caused that? Reading Steiner has only been established to send Okabe to the same time on a different worldline. Never to the past/future. The only thing that ever moves Okabe in time are time machines from the future and the time leap machine, neither of which use Reading Steiner.
Amadeus has Reading Steiner. What the fuck.
Literally every plot line involving Kagari, bitch is a walking plothole generator
Even though Reading Steiner is fleshed out a bit more, there is still no explanation as to why Okabe's Reading Steiner is strong enough to completely and perfectly overwrite memories from other worldlines
Maho-tan can only carry so much on her tiny back. There were some genuinely good stuff about it like the potential horror of AI and how Leskinen basically is the Mad scientist that Okabes persona wants to be but it just doesn't really go anywhere.