nope, they aren't rigged.
You are playing your DTs inside ELO rooms. For one, players are expected to play slow there and not fast paced. People take their time in playing their cards there. The time limit to play cards there are also longer than normal.
Another is that you are actually losing more than you are winning. In your last 21 battles, you only won 8 times, 1 draw, and you had 12 losses. Of course you won't get to the top.
Top players play fast and can have more than 20 battles per DT, other than that at most they only lose for like 2-3 times. Some don't even lose. Aside from that, deck build plays a very important role on how the stars in cards are distributed. 5 stars give less points if they win against lower star cards. Low star cards give more points if they win against high star cards and so on. There really are many factors at play.
What is the best format to play to get the most points then??? I know there is type 1, 2 and elo and they all seem to fit inside the same tournament... I made a really good 25 star type 1 deck but it is still very hard for me to get in top 100, outta 5 tries I got around 127th which is pretty good I'm not complaining about that but the thing is the Leader still has aleast 3x more points then me.