Maguire should have cleared at least 1 of the 2 crosses for the first goal
Garnacho should have finished his chance better not knocked it into Zirkzee
2nd goal Lisandro and Dalot should didnt reset into actual positions from their corner position quick enough. The set piece had broken down but they regained the ball and put a 2nd cross in, and the players who were in that area from the set piece left the area without the LCB and Left Back reverting to their normal positions. So Brighton had multiple players at the back post for that cross and we didnt have anyone defending it. Very poor
Need to see more footage of the 2nd goal, but Lisandro is fairly close to the player crossing the ball no idea where Dalot is and not sure who were the players who vacated the left back area where they were positioned during the set piece, but I believe Casemiro is one of the ones who pushes out after the initial ball thinking we're going to break or something.
Edit- McTominay is on the post, then comes out and goes into the middle and the ball goes over him to the leftback area. Casemiro is indeed the other player who moves forward thinking we're able to break. And Antony? loses the ball allowing the cross