Ferrari has a big problem with confidence in the strategy desk.
First you have the confidence of the drivers.
VER and HAM often complain about strategy calls, but when the "Box Box Box" command is given, they trust their engineers and head into the pits. With Ferrari, it seems to be a negotiation every time, and LEC being the more compliant one, too often gets the short end of the stick for it.
This takes time, and makes them miss their windows of opportunity. If the Safety car wouldn't have come out, I'm pretty sure HAM would have came bearing down on both SAI and LEC. A racing driver, especially for Ferrari, needs to be able to cope with a direct instruction "You are not fast enough. Now let your teammate through". Repeated requests to up the pace is just a silly waste of time.
They also need to be able to cope with the fact that sometimes they are sacrificed for the greater good. I guess Abu Dhabi wasn't fun for PER last season, but it's all a part of the gig. Here LEC had both track position and championship position, but SAI was still given the optimum strategy. This was probably because his tires were worse, and he would probably fall like a stone at the restart. But that would have been a part of the job. A team needs to make those calls, and a driver in a top team needs to accept them.
Secondly, the Ferrari strategy desk needs to have some confidence in itself. It seems like RB and Merc plans outs it's races and acts on events, whilst Ferrari mererly reacts to others, which almost always put's them on the back foot.