Some people in the last years have the tendency to undervalue Argentina because there is the Messi factor and all the other players look well bellow his level, which is fine. The other factor after 2018 they were looked with suspicion, even winning Copa America everyone was "Yeah ok but the European sides have won the last 4".
Then in the Finalissima against Italy everyone was saying " Ok a glorified friendly". What no one mentions is that no one beated Italy so easily in Europe until that period (ok a couple of weeks after they were well beaten in Germany").
More important than that, there is the perception of current Argentina players aren't so good as they were in the past because beside Messi they only had a near end Di Maria, Otamendi and a couple of guys who aren't protagonists at Real Madrid, Barcelona, even Lautaro was seen as a guy who shines there in a weaker Serie A than in the past.
As someone who follows particularly well Youth Football, particularly the Portugal Youth NT's and Portuguese Clubs in the UEFA Youth League, I have to say this perception without Messi Argentina over the next years is destined to fail is way over the top.
Sure, I don't think it's clear they will have a Messi or Di Maria type of player, but let me say that comparing Portugal vs Argentina between the born in 98 to 2002 age groups (not saying compared with Portugal is decisive) for me the only age group which I think they are clearly inferior to us is the 99 one, and our 2000 maybe has more options in quality but we don't have a prospect on the same level as Julian Alvarez, the rest (98,2001, 2002) would say they have more options on the relation quality/quantity.
Of course they need to be measured with the likes of Brazil, Germany, France and so on, was only using Portugal because I think we normally have been doing a good job over the years on our Youth NT's, the performances of the Senior sides is another matter.
98 - (Romero, Lisandro Martinez, Mac Allister) 99 ( Facundo Medina, Leonardo Balerdi, Esequiel Barco) 2000 (Julian Alvarez, Fausto Vera) 2001 (Enzo Fernandez, Thiago Almada, Alan Varela) 2002 (Carlos Alcaraz, Facundo Farias, Alan Velasco).
Of course we don't know how many of these will reach or perform at the top leagues in Europe sooner or later, and maybe I left other names who are performing better than this, but they can build a more than decent squad for 2026 even without Messi, Otamendi or Di Maria, winning is another matter.
And I am absolutely sure their 2003 or 2004 generation is as good if not better than this ones I mentioned. The death of Argentina was a bit exageratted and people should stop only making conclusions if they play for Real Madrid, Barcelona, Bayern, PSG, City or Liverpool, there is more than that to evaluate a good International side.
Won't be surprised also if in the future instead USA, Netherlands or Portugal clubs we will see more Premier League clubs going to sign players directly there, Brighton is already a good example of a Premier League club who knows how to scout in South America, let's not even forget the historical and cultural ties players from Argentina have to Spanish or Italian Football.
Not only to mention that Alvarez and Enzo Fernandez only left Argentina 5 months ago, it's not that they learned how to play football in 5 months at Europe I would say...