Perhaps my post was not clear. For the money we have spent (what you called constraints), our mercato is very good. Marotta is a very shrewd operator. He knew we were skint, so for a Conte replacement he went for someone who can use the same squad. We have replaced Lukaku, Hakimi and Eriksen by spending only €13m on Dzeko, Dumfries & Calhanoglu. While it is a bit of a downgrade, its great business if the constraint on spending was 13m (or 43m if we include Correa). I guess that is what you are saying, and we have no disagreement here.
My problem with this mercato is that Suning got greedy and moved the goalposts midway during this window. The stated objective was to make 80m net cash flow from transfers. That was achieved with the Hakimi sale. This should have meant that Inter could invest the entire Lukaku money on new transfers. Marotta could have killed it with that kinda budget. But clearly Suning have changed the objectives and are trying to make more money from the mercato. That is unfortunately the main problem here. We could have become stronger as a squad, instead we look weaker despite Marotta masterclass on a shoestring budget. Our depth in most areas is still shite.
If we also sell Martinez, Barella, Skriniar and Bastoni for big money, and replace them with decent but not as good free agents, would you still say we had a good mercato "under the constraints"? No.