These are all answered in my previous blogs/threads.

Step 1)
All squads and individuals are converted to units. Each unit is the sum of Mu of all the individuals in the squad.

Step 2)
Multiplier is applied to all units

Step 3)
The highest value unit is placed randomly on Team A or Team B, let's say Team A for simplicity.

Step 4)
Units are placed on the opposite Team, Team B, until the sum on Team B exceeds Team A.

Step 5)
Units are placed on Team A until the sum of Mu exceeds Team B or either team has 16 player. Then the rest go on the other team.

Step 6)
Repeat until all units have been placed.

This method guarantees that the two best squads are always on opposite sides.

It also guarantees that the second best and third best squads are on the opposite side of the best squad.

If there is a single 6 man squad and no other squads, it gets placed on one Team and ALL the best individuals on the opposite side, due to the multiplier, usually 8-10 of the best solo players fight the 6 man squad.

Finally, this method has never been shown to have not worked as intended. Players concern is usually because the second best squad isn't all in the same corporation so it looks like randoms.