It sucks if people are rude to you in general so I certainly don't wish that on you but I think you might not have the perspective that an LGBT person does. I have had my share of rude servers and salespeople, snotty gay people and straight alike; it may or may not have had anything to do with my orientation. But unless a shopkeep is yelling "fag" at you (or the straight equivalent...oh wait, there isn't one...) you definitely don't experience the level of homophobia that a queer person does. It's really not comparable. And I know that can be hard to see through privilege or when people are rude to you but, unfortunately, rudeness exists everywhere and it is NOT the same as discrimination.