I didn't think he was that bad. His side was targeted and overloaded because Lingard naturally drifts inside and leaves his position exposed; the amount of times they actually got through Dalot specifically was negligible, he tended to make the tackle or force them back when he was one on one. Notice how Lingard ended up being taken off and Herrera shifted across, it wasn't for Lingard's attacking ineptitude. Offered a great outlet going forward and manages to get into attacking positions on a regular basis far more often than Young and Valencia due to his youth, although his crossing and decision making was poor as his brain probably wasn't used to having to act with such haste in attacking situations. That comes with experience however.