Matchmaker can be quite the pain, but if you go in games with a strong squad of 3-4 you can achieve much better results. Since I joined a corporation, my win steaks got much better (6-8) and I lose a lot less games than before (it was more like 2-3 win and 6-7 loss now its the opposite). I am not sure about T4+ matches, as I mostly stick to smaller tier, but I will look into that problem in more detail.