First, i want to say I'm sorry about your experience. I wish there was a way that we could all have control over things like this but sadly that isn't the case. Some people are malicious and others are far too aloof to realize the potential damage in accidently busting someone out.
The game is designed as you say. It's not the way to come out but it's depicting a way to slowly come out. It's also designed to help connect the dots between things that don't make sense or ways that people can perpetuate their own homophobia internally and shows potential ways to mitigate that--to slowly work towards your own level of acceptance or understanding of that. This will not be everyone's story. A lot of Zack's connections and philosophical rants are my own and how I connected the dots. I write it to reinforce it in myself and I write it in the hopes that it will help others that have struggled with their own fight of acceptance. I do wish you the best in your journey. I can't promise you that your own journey with be without obstacles; but I will say that mine has and is getting better and for that reason alone, I'm optimistic for you <3