What did I do wrong? Some advices would be welcomed

[HeavensAAA]

Quick sharing of a nearly identical setup solution vs a 4-4-1-1 in an asso match 1st leg just now.

Only minor difference is playing 3 DCs instead (because my 3 DCs are all better than DL & DR - level-3 club some player purchases are still slightly limited by funds available), as opponent kept the same formation in both ties yesterday and winger on the bench is 1* worse.

Quality: 111% vs 113% - hence chose 21% possession bonus (when quality and whites are similar, engine calculation on chances would favour the team with possession)
Result: 5-0, with 70% possession






Opponent did try to sub his MC out and change to 4-3-1-2, and that is easily countered by moving the 2 MCs as close to DMC area and DMC pulled back a bit. Midfield then has extra space and so my ML & MR scored the last 2 goals.