Map selection for team arena

Why does team arena just keep giving us the same 3-4 maps. In my last 60 matches I’ve never once got torque, riptide, Pegasus, regret, overgrowth, empire. Every single time it’s either ctf on coliseum to strongholds on the rig or plaza or assault on truth… EVERY SINGLE TIME ITS 1 of those 3 matches. How in 60 games do I never get any of the other 7 maps. It’s makes it feel bland and old playing the same maps over and over. Riptide and over growth are two of my favorite maps and every since the latest update they have never once been selected in over 60 team arena matches… How is this random???