It never “gets better.” The campaign which tells you that it does has no idea wtf they are talking about.
People who are narrow minded will continue to hate and discriminate you for who you are. But when you grow older you will learn to understand that their hating you is not your fault. You can try to educate and help them understand you better. You can also try to understand why they think the way they do. Investigate. Research. Do not give up. Don't hate them for hating you. Invite a dialog with them.
When you understand where other people are coming from and why they form the opinion that they do, you can choose to agree or to disagree. Being able to agree to disagree is a sign of maturity. You have power when you recognize that your being you is your own business. Life is too short caring about what other people think. You are not responsible for their happiness. You are however responsible for your own happiness.
You are you. You have you. You will always have you. If you believe in yourself, you need not care what other people think. If they hate you for your being you, just tell them to fuck off. Be yourself. Never change for others.