For first : your tactic is not good.I dont know what you mean with 3 defenders(3 DC's or DL/DC/DR) and I dont know what you mean with 3 midfielders (3 MC's or ML/MC/MR).But my suggest dont use this tactic.I used it once and it was not effective against very weak team.Against 4-1-2-2(2 amc)-1 you must have DMC and dont play with AMC.Soo... there are a lot of options.You can use ML and MR and play from the flanks,but my suggest is 4-5-1 V style formation.
For second : this guy is playing attack from the left flank.So you must counter it with good DR.With your tactic he was beat you cuz he gained ball possession.Beat him for sure with 4-4-1-1.But put blue arrow of your MR and red arrow on your ML.Attack him from the left flank or mixed passes.It's your choice.