I am not sure if it's just his character on a whole that's the issue. Watching various interviews from his teammates Gomez came across as a very chill character. Which seems to reflect how he is when he is defending. He tends to cruise around and is very passive in defending, not unlike Trent. They react, instead of being proactive to keep close, to block the attackers and do abit of dark arts to ruffle the attackers. They just hang around waiting for things to happen, then they react. He might be a good defender 1v1, but when he doesn't get close enough to prevent a first time strike, he is almost useless.
Like the 3 chances Alisson saved, he was just completely lost, with all his physical attributes he can't react fast enough just by following the ball (instead of his man). He might actually be better playing as a RB, there is less man marking involved.
