Recently I've noticed in my games that I usually start on the red side

During the last weeks I've got a feeling I somehow mostly end up on the red side of the map. So I checked my last 20 games and the result was: 16 / 20 on the red team. Is it truly random on which side you'll be placed or is this some prearranged shitt?

I self consider the red side (which is the upper half) slightly worse compared to the blue one. In the blue side you can easily start jungling on red camp every time since there's botlane giving a faster pull. Also there is this annoying little glitch with the wolf camp. See, I play alot of Gragas, and on the blue team I can bodyslam through the wall near the basegate and collide with the wolves. However, on the other side this is almost impossible to do, the wolves simply won't get hit without careful positioning before bodyslamming.