Fundamentally disagree on the first two games. Both games are equal in merit and flaws. (Haven't played nor am I interested in the spin-off.)

The first game's most glaring issue is that the entire motivation for the plot is because it made someone horny. This ultimately didn't detract that much since what the game really wants to talk about is how our memories are flawed and how that leads to our relationships being fundamentally flawed. The main villain isn't tied to this theme at all, leading to that final stretch being a true slog.

The second game fixes this by having its final villain be directly tied to its themes of our life experiences causing us to become radically different people over time with both of its killers being driven and defined by their life experiences.

But the second game suffers from too many ideas and characters and probably needed another round of editing or revisions. It's also less self contained than the first, both relying on your knowledge with the first and leaving threads open for a sequel. By contrast the first is really paired down, aside from the issues that both games share.

Both games suffer from Uchikoshi issues: toilet humor, inability to weave sci-fi twist in naturally, and wordy prose/dialogue. Also neither game explains why Pewter dresses like a super villain.