You are getting boring pal. Every weird result you see or even sniff become "omfg game engine is **** see this". Wtf. I could easily say like many to stop complaining or quit the game, but i'm not that type. But AT LEAST try to look deeper into things before going nuts over any tiny piece of match and spouting nonsense.
In the first case, not only he left totally unguarded his center vs the diamond (which is a very offensive type formation, yet rock solid in defense), but he left alone his 3 STs against 4back + 1 DMC. That is enough to double/triple mark each of the STs. Point is, you can't set 3 forwards against the ND. 2 AMS + 1 ST woulda have been WAY better. Not to mention the keeper's 9 rating.
In the second case, despite the arrow looks idiotic, it is indeed effective. Playing on only one flank is retarded, as you limit too much your play. Even having better Q players against a massive attacking side would be enough to stop it. If you wanna go deeper, the guy played with a DMR and a AMR, which at turns were double marked by 1(AMC-MC) and 2(MC-DR). Again, a 4back vs 2 STs aided by the DMC, while his 3 STs are facing 2 DCs and 1 DL, with an extra AMC as backup. If the other played left flank, the DML was on red arrow for sure. The 3-5-2's MR would be countered by the DL of the arrow's formation, still leaving DMC+ 2 DC dealing with the strikers and the AM, so at WORST a 1vs1 situation. If the arrow formation went for long balls, then the 2-0 is pretty real as result, and probably could have been even a wider gap.