I was talking about the stage, not necessarilly the Giro. Or at least not at that moment. You are right that he did not get the GC treatment, but they did not actively ride against him like you insinuated. They rode for Evenepoel.DQS paced a lot today and they knew even from Tirreno Almeida doesn't like rainy conditions. They went with "Almeida is the leader" to ease off Remco's pressure. The pace set by Bahrain was really high at the end and they dropped Almeida by a bit.
DQS didn't send any rider at the back to give him a hand and when Ciccone attacked, DQS went to impose a high steady pace which made sure Almeida would never have a chance. They thought the same as you "He is done". We saw a lot of bounces back in the Giro, last year had plenty. They could've tried to limit the losses but they chose not to.
If the roles would be reversed do you think DQS would've let Remco alone and say "He is done" or they would've drop someone to give him some help? Would've they maintain a high pace afterwards and make Remco a dom for Almeida?
Almeida didn't got the "GC treatment" from DQS even though he might have been done anyway as you say. The gap is probably also higher because the guy kinda gave up. But I think for everything he has done at DQS he deserved at least a bit of support. If he wouldn't have left I think they would but now, they obviously would rather want him as a domestique for Remco until the end.
The attacks from GC weren't substantial today, the only guys that lost contact were the ones having a bad day( Almeida, Bennett). Attacks left and right? Doubtful, most of them were miserable and Bahrain still had a good team there. The only certain attack was Landa. It was more like a test to see is actually in good form and can't be let go. Remco wouldn't have lost a lot of time anyway imo, he still had good enough legs that he was the one following the others.
Yet if i remember well Evenepoel only got some shortlived support. When the attacks came, he too was alone.
EDIT: watched the replay, at the moment Almeida gets dropped, there is no DQT at the front. Evenepoel is isolated in the center of the bunch, and there is one other DQT dangling at the back. My guess would be Masnada, i think it's #97. So at this moment Evenepoel has no support either and Masnada is hanging on for dear life. I guess they could have told him to help Almeida, but it's also possible they decided to at least keep Masnada in the GC, if they knew Almeida was done anyway for the day and sacrificing Masnada wouldn't make a difference. Then moments later, Serry gets caught by the Evenepoel group, and he starts riding tempo for Evenepoel for a few hundreds of meters. That doesn't last long, and Ineos takes over before Landa attacks. As soon as that happens, Evenepoel is completely isolated.
Almeida crosses the line with Knox and Serry. So the team definitely didn't ride against him or hung him out to dry. Support could have been better, but they might have decided to keep Masnada in GC instead and hope Knox could help Almeida.