by far one of the worst endings I had the displeasure of encountering in a video game, everything else was mostly fine, but after I followed all of Flowey's orders, the game blocks me from proceeding to what Flowey wants me to do and forces me to talk to the annoying bird (which I tried to kill before, yet this time I don't get the chance?) and betray Flowey

what's the point of giving me options then? "oh but the genocide route exists" isn't an excuse to make such a bad normal ending, the only thing differentiating my run from a genocide run is that I didn't walk back and forth killing random encounters for like 20 mins for no reason, if you don't want to give me the genocide route, fine, but at least make a more appropriate neutral route, not one that completely flips the personality of the characters