Casemiro cost me nothing, but cost the CLub a lot. You sound like as if 100m on this and another 100m on that is OK. The big mistakes that this Club made in past decade, is spending, or more appropriately, wasting money on "useless" players, instead of players who can contribute to the team. Was Sanchez a useless player, he was toxic. Was Pogba a useless player, perhaps less but too many ups and downs. We were going round in circle on team development and have to find replacement every 2-3 seasons. I can accept Bailey Lindelof type of mistakes, but not Maguire, VDB, Fellini mistakes, when they clearly, 100%, doesn't suit our style.
Again, every m that we spent on a player that is useless, there is 1m less for the right recruitment. You only have to look at Chelsea in past 2 seasons, full squad of good players, but can't find their Best 11.