The Mexico team during recent times including the last qualification cycle and in friendlies against the likes or Uruguay is the worst that I've ever seen. I follow the team quite a lot and support them as my second favourite NT as my better half is Mexican. I remember there were concerns about the team going in the 2014 World Cup and they ended up performing very well, but they had a noticeably stronger squad of players back then they had have now.
Within CONCACAF their arch-rivals the USA look to be pulling away from them, and the lack of their Mexican players getting regularly minutes in top European leagues (the only regular starter at a club in a top European league this season has been Lozano at Napoli).
It will be interesting to see if they can reach the knockout stage at an 8th consecutive World Cup. Their opener against Poland is of course hugely important for both countries' chances.