Lazio were doing just fine last night - comfortably containing Leverkusen, even if there was little prospect of Lazio doing much themselves.
But you are always going to lose a game where you have defenders making mistakes as bad as the one De Vrij and Mauricio made for the first two goals.
The reaction to the game has been to be generally critical of Lazio's approach/performance, but they just made horrendous individual errors.