He created a few opportunities via his ability to link play which put the likes of Sabitzer, Dalot and Weghorst into promising positions which we didn't take advantage of. And his defensive ability is also a big plus.
When your keeper doesn't have the ability to break a line/resist the press or your outfield players are unable to provide technical security in possession where some look for the killer ball at every opportunity, then your football won't develop to the requisite level unless those players who are weak on the ball either improve or are replaced by players who do provide a high level of technical security.
And having a collective unit with a high technical level who will pass vertically at every opportunity whilst maintaining a high pass completion rate will create the foundations for a proactive attacking team that will be able to play the game higher up the pitch and the pressing and counter pressing will be more effective.
We concede the first goal because the keeper can't resist pressure and the two centre backs are occupying the space either side of him which creates the error leading to the first goal. And the outfield players struggle because they aren't technically good enough to impose their game on the opposition with the exception of Antony.
I've been saying the following for a long time. That the best teams are those teams who are best equipped at progressing play from the goalkeeper, CBs, deeper mids and fullbacks. And if the above isn't good enough to do that then you will struggle to compete with the best teams.