Andrew: Williams are in a world of suffering at the moment, and ironically Logan Sargent's lack of performance against teammate Alex Albon is not the most pressing problem.
Sargent was responsible for only one of the crashes that put the team in such a difficult situation. The first was when Albon lost control at Turn 6 in first practice in Melbourne, and the other before Daniel Ricciardo went onto the right between Turns 2 and 3 on the first lap. At Suzuka, it seems to have been caused by not looking in the right mirror.
By then, Williams was already in a difficult situation. As a result of a combination of circumstances rooted in an attempt to upgrade the team's operations to a state-of-the-art level, they entered the season without a spare chassis.
Team principal James Bolles has been open about the pressure on his team, saying they were pushed to the edge over the winter. Something had happened, it was the spare chassis, and no one could have predicted early in the season that the team would have had three such big crashes and caused so much damage.
It exposes them and is very costly, especially in terms of finances, and it is inevitable that there will be knock-on effects throughout the season in terms of development, for example.
As for Sargent, yes his performances have raised questions about his longevity in F1 and there are all sorts of considerations there, but that is not Williams' priority at the moment.