Easy Beef Chili

1 ½ pounds 80% lean ground beef

1 red bell pepper, chopped

1 medium sweet onion, diced

1 (16 ounce) package frozen yellow and white whole kernel corn

1 (15 ounce) can light red kidney beans

1 (15 ounce) can dark red kidney beans

1 (15 ounce) can pinto beans

1 (14.5 ounce) can diced tomatoes

1 (10 ounce) can diced tomatoes with green chile peppers

1 ½ cups water

¾ cup brown sugar

3 (1.25 ounce) packages chili seasoning mix

3 tablespoons distilled white vinegar

3 tablespoons yellow mustard