Star player doesn't matter in the off season unless you really really want to be in the non broadcasted top 16 races. If next year is like this year there will be another exhibition season in Jan/Feb to get back S rank for the first official season so those that didn't do the off season can get S rank back for the first official season and try for the first top 16 race that matters.You ARE impacting everyone in both the race you are in, and every split below, because you are affecting the points people obtain in all those races.
I did get star player, but with only 500-600 points to spare. I'd only have had to lose about 7 places across my counting races to not get it, and I shouldn't have to race against people who aren't from my region, because the criteria for getting star player are based on the strength of each region, so adding top players from other regions into the mix violates the assumptions used in setting the criteria. It's fundamentally wrong for you to be taking points away from people in another region, as well as against the rules.
As for thinking it's someone else's fault I'm not doing better, the fact is not everyone has the same talent - for almost everyone in the world, there are people they will never be able to beat, and if one or more of those people from another region is in their race, it will reduce their score, and that isn't something that is supposed to be part of the game.
Take it to an extreme, suppose there were 10 people in the world who are better than the best in EMEA, and they entered every EMEA FIA race, ensuring that no EMEA driver can finish higher than 11th in top split, meaning that the best EMEA drivers get slaughtered by the people finishing high up in 2nd and 3rd split. You wouldn't see that as being in any way wrong, or a problem?
For me personally, I know there are plenty of guys I consider better than me that have not been to a live event but I've been lucky enough to attend 2. That doesn't stop me from trying to qualify and if there's a way to sneak in by way of the smaller Oceania player pool because I actually live in Australia, then great. Of course I will get defensive if someone from another region pops in and impacts the races. But at the end of the day I know I'm on the fringe of top 16 and live events but I don't really care what happens in the off season.
What you describe as an extreme, in reality actually happened with the real top 10 (or even 15) of EMEA, most of them ran almost every slot this year. There's already been discussions on this but in short it's a function of the points system and player pool. Other regions it wasn't quite as necessary to run all slots.