Anyway, defending isn't about tackling. If all your players have a good shape and in a good position, you can block the opponents options and force mistakes eventually, without a tackle being made. Sergio is always in a tactically good position. The others are reckless and ruin our shape, they might win the ball but overall our defence would be poorer.
Also, pace isn't an issue for a DM, all the best DMs today are quite slow. As I already explained (and you ignored) you need pace in the back four to prevent a counter. Even with a quick DM, he'd be too far away to make up ground in the counter.
Also you should be glad I called you a troll. That way I assume you're intelligent enough to know Sergio is good and are just trying to create reactions. If you're not a troll and genuinely believe those things, you just lack football knowledge and are an idiot, which is worse than a troll. For example, how the fuck can a dive prevent a counter when the other team has the ball? You realise that's impossible? You need the ball to dive.