@DeathRaven_1983 The problem is not the game or the "team balancer" in general, the Problem is YOU (probably Playstyle) and probably mostly your TEAM.
Battlefield is a "TEAM"-based arcade like shooter with a "Battlefield-themed" Sandbox.
EA/DICE also implemented a "Clan/Platoon" System.
A Platoon plays together or if they want to against each other but mostly they will and want to play together.
That's the "reason" because "Platoons" exist in general.
So if people like me want to play with 12+ people on one site in a "Party-System" on an official DICE server (because on RSP Servers you have to "follow" stupid rules or get's kicked for playing "good") without to play against each other, then it is achieving the mostly whished "Teamplay".
Yes, a good Platoon can win rounds, but after a few rounds also the "Platoon" site will loose.
We also notice sometimes the opposite effect so even a nearly entire random team can also win, but what I want to say is, as long the Platoon are no strictly "military" organized Platoon where everyone has to follow "Orders" and "Playstyles" , you can also win against Platoon teams when your Team is playing good. Most platoons are "fun" based or "casual" so you don't have to be afraid, play a few rounds against them and you will notice you can also beat them.
