Yes you are wrong. I’m not one for saying how someone feels is wrong but in this case you’re wrong and you need to redirect how you feel.
Sometimes we tend to compare ourselves to others. Wrong move. You don’t know what someone is going through and what their portion really is. Relationships tend to look one way in public and one way behind closed doors. That’s not to say it’s not about the same love but a good couple knows to keep their laundry indoors and to have a united front.
While you basically envy what they have, focus on your own. There are things about a relationship you can look up to but never want what they have. Focus on making your relationship stronger. If you do that you won’t worry about what others are or aren’t doing.