I agree with OP. Underdog teams have way too much possession and pass completion ratio. Especially against 3 Defender sides it's impossible to win the possession game even as much bigger team. I fixed that by somehow creating an so far invincible 3-2-2-3 myself.
The pass completion ratio is glaringly broken. I usually see % around 90%, rarely below 85% and almost never below 80% even against lower league sides in cup matches resulting in high possession. For me it feels like there's something wrong with the waste time TI.