My Teryaki Doesn’t Taste Like it Does at Takeout Spots. Any Fixes?

I've had this issues for a while but I'm not sure if it's just the brand or if there's a way to fix it. How do restaurants get that distinct flavor to their chicken? Note: I am using store-bought teryaki GLAZE and I think that might be the issue. Only problem is that I'm not sure how to make it taste better.