The Athletic Club is very mad because of Barcelona sending an offer for their player. Even Daniel Vivian, the player of the Athletic Club is mad and he blamed Laporta the CEO of Barcelona and he said Laporta is damaging their team and making Nico William lose focus and this is not just about one player but the whole team is angry.
They don't want to lose Nico William easily but the money Barcelona should pay is not huge enough to make them stop and it seems Nico William also likes to play for Barcelona.
With issues like that coming out, it was clear that Nico would definitely be a little disturbed. Moreover, currently he is facing the final match of a European competition, so it is natural that other Spanish national team players are angry with Laporta. The reason is, at a crucial moment like this, Laporta even made an offer to Nico. Apart from that, if we talk more deeply about the offer, it seems like Nico would really agree if, for example, he was contracted by Barcelona. Because as we know, he already has good chemistry with several Barcelona players such as Yamal and Pedri. Because Nico's performance at the Euros this time proved to be very good with Yamal on the Spanish front line. So it would definitely be great if, for example, Laporta succeeded in bringing Nico to Barcelona. Certainly Barcelona's front line will be much sharper than this season.
However, as you said, it seems like Atletico Bilbao will find it very difficult to let go of Nico. The reason is that Nico is a player that Bilbao always relies on in the wing position. So if, for example, Nico moves to Barcelona, it is certain that Bilbao's wing line will suffer a little. Apart from that, Barcelona also has financial limitations at the moment, so you can be sure that with Nico's current price, it will definitely be a bit burdensome for Barcelona. But from several news media that I read, Laporta said that he was ready to bring in Nico at the price he currently has. I also don't know for sure whether this news is true or not, but what is certain is that after the Euro is over, I'm sure there will be many clubs who want to recruit Nico. However, I also predict that Barcelona will indeed be the right port for Nico.