I'm the only person on earth who likes subway sandwiches
There is nothing wrong with that. What is it that you like about them?
I like subway sandwiches and I like them because everyone seems to hate them
If you like something and are comfortable enough to do your own thing, then there's nothing wrong with that. If you have the means and are hungry, enjoy your Subway sandwich regardless of what anyone else thinks.
Nope, I hate it. People make me feel like I'm stupid for liking Subway sandwiches. I hate people.
It is okay to eat things that are unpopular with other people. Subway food is healthy and good. You don't need to do things to please other people, just do what makes you happy.