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lol, that's certainly a strong turnaround of an opinion.
To answer the initial question, no, re:Dreamer is not a "going to school simulator." It is a largely linear visual novel with many small variant branches based on the C.H.E.A.T.S. system to add variety to that largely linear story and to change context for why and how things happen. The campus setting is important, but the structure and flow of the visual novel will befocusing on important events of the sixth main months of the story through time skips to certain set pieces (such as a Halloween costume party, home visits, a Christmas Eve date, a spring break trip, and extracurricular activities); providing supplemental context for the setting, those events, and the major characters via the World Information entries; and a brief epilogue for each route that ends shortly after Zach/Zoey graduates to show what has happened in their life after the re:Dreamer season has ended (and they have likely not changed back) and to provide a glimpse of what the rest of their life is going to be like now that they are an adult.
Classes are focused on for the Friday intro day (Zach's last day as Zach), the following Monday (Zach's first day of classes as Zoey), and the briefly in the following Friday (to contrast the difference of the routine that Zach had with the routine that Zoey has). With exceptions given to the first day of classes of the second semester and a potentially compromising transformation in early November that will make maintaining Zoey's disguise as Zach harder, they will otherwise not be focused on in the story of this visual novel.