It's really hard to be a גוי

At first glance it would seem to be simple, they have only 7 mitzvos to keep (as opposed to our 613). But in reality their existence is much more complicated for the following reasons:

1. What are the 7 mitzvos that they need to keep? Guess what, the Gemara in Sanhedrin (57) has a dispute about what the 7 mitzvos are. for example, one Tanna says that castration and כלאים are 2 of the 7 mitvzos. 
2. They have no gemara, shulchan aruch, poskim to ask any questions. If a גוי has a question about the 7 mitzvos who can he ask? Who even knows the answers? Is there a mesora of psak on these topics?
3. The Gemara keeps adding on additional things to the 7 mitzvos. For example, a גוי who keeps Shabbos is חייב מיתה, a גוי who learns Torah is חייב מיתה.
4. All 7 mitzvos are capital crimes by a גוי. If a Jew steals, he returns the money and that is it. If a גוי steals, off with his head. 
5. None of the regular provisions that apply to the death penalty for Jews that make it basically impossible to kill someone apply to a גוי. There is no need for:
1. התראה
2. יתיר עצמו למיתה
3. 2 witnesses (even 1 is enough)
4. 23 judges, even 1 judge is enough
5. There is no disqualification of relatives as witnesses 
6. One of the 7 mitzvos is Arayos, however, what the definition of Arayos for a גוי is a dispute and very unclear. Some TAnnaim claim that it is the same as for Jews, some have a much smaller list, soem have a bigger list. Rav Huna claims for example that a גוי can marry his daughter. R' Elazar said that a גוי is killed for having anal sex with his wife.  
7. The Pnei Yehoshua has a famous opinion, that for a גוי marraige if for life. There is no divorce. He claims that since the institution of a Get is written only for Jews it doesn't apply to a גוי. 

In short, it practically impossible to be a God fearing גוי and really keep the 7 mitzvos, the devil is in the details, and the details are simply not well known and decided.