Greenwood can actually compete in La Liga. He is a young player and has great talent. But I think his decision to move to Marseille this season was also a good decision. Greenwood is still 22 years old and maybe he will get lots of opportunities to play with Marseille. Greenwood has competed in the EPL so I think he will have no difficulty adapting and will become one of the best strikers in Ligue 1. I hope Greenwood can perform very well and consistently in Ligue 1 and will see his name on the list of Ligue 1 top scorers.
Young strikers who have played in the EPL will certainly not have much difficulty adapting to a new team in Ligue1, especially since the competition in Ligue1 itself is not that competitive. However, with Greenwood's presence in Marseille in Ligue1, it is certainly hoped that it can bring a little change to the competitive scene so that Marseille can become a tough rival for PSG next season, although I am also not immediately convinced that Marseille will be able to stop PSG from winning again in Ligue1 next season.
Marseille don't have what it takes to be a rival to PSG who the league is like a birth right to them. PSG is the only best team in Ligue 1 and so far we have not seen a club that is competent enough to win the league from PSG but I believe that in future there will be one.
This was how Bayern dominated Bundesliga for a long time until last season that Leverkusen was able to build their team and dominated Bundesliga without reserve, so I believe someday we will see PSG in second or third place in Ligue 1.