I’d probably say that Poch is most to blame for our failure in big games. Feel like he panics by either rushing key players back into the XI when not fit or makes stupid decisions with selection/ tactics.
I think the way forward may be to re-apply what worked versus City and Ajax in future big games (though not necessarily versus teams that sit back). An aggressively competitive approach, pacy attackers, playing the best available 11, lack of a default scoring option and all-out attacking all played their part, IMO.