Game developer here.
1. Some inexperienced developers consider sandbox games to be superior to normal Virtual Novels, so they decide to make one sticking to the form (map, time system, inventory etc) but add very little to the game infrastructure. The result is a VN masked as a sandbox game. Most of the time you only have one thing to do, one option to choose from, but due to the map and/or time elements you have to search it. Is Titty McBigboobs at school or at the park? Is she there in the morning or in the afternoon? You can't progress the plot without talking to Titty McBigboobs but you have to search for her all over the place. So: bad implementation of sandbox.
2. The other issue with sandbox games is that some player simply don't want them. They just want to to click "next", let their arousal grow and eventually see some good sex scenes. It's completely legit, not everyone has the patience to solve puzzles, increase experience points or (in my game) manage an empire. Some just want to chill and let the story move on its own with them having to push it. Some people don't game at all, other want to game with their pants on and are not happy about mixing fapping and gaming.
1. Some inexperienced developers consider sandbox games to be superior to normal Virtual Novels, so they decide to make one sticking to the form (map, time system, inventory etc) but add very little to the game infrastructure. The result is a VN masked as a sandbox game. Most of the time you only have one thing to do, one option to choose from, but due to the map and/or time elements you have to search it. Is Titty McBigboobs at school or at the park? Is she there in the morning or in the afternoon? You can't progress the plot without talking to Titty McBigboobs but you have to search for her all over the place. So: bad implementation of sandbox.
2. The other issue with sandbox games is that some player simply don't want them. They just want to to click "next", let their arousal grow and eventually see some good sex scenes. It's completely legit, not everyone has the patience to solve puzzles, increase experience points or (in my game) manage an empire. Some just want to chill and let the story move on its own with them having to push it. Some people don't game at all, other want to game with their pants on and are not happy about mixing fapping and gaming.