My biggest failure on those games is the fact that i get bored.
You're right. You say so yourself. Poker should be played as emotionally neutral as possible, although we are human and playing completely rationally 100% of the time is impossible. But the best players have great emotional control.
Have you tried to play several tournaments at the same time? That way you will be less bored. I'm talking about online tournaments, of course.
And the fact that i easily get frustrated if i am losing.
Again, yes. Put a solution to it. Don't repeat the same thing that you know doesn't work for you.
If i find out how to not get bored or frustrated, i would think i would be rather good in poker. Now i am not.
Start by playing on several tables, as I mentioned, I have the impression from what you say that you play only one.