system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] In all the failed alternate futures, how does Thanos usually get the time stone from Strange?

Strange appeared to put the stone in a pocket/mirror dimension with Thanos apparently having no way of extracting it. That said without Strange giving it up willingly how does Thanos eventually win here?
gpt
By not giving him the stone Strange can actually win that battle. But that's a different problem. 
By winning that battle he prolongs the war. Thanos doesn't stop his crusade just because the stone is out of his reach. He continues, killing half the people everywhere he goes. He probably hits earth first but its after vision has already been killed. He uses the reality and space stones to put vision and all the pieces away somewhere safe. Now he has two stones he can't get his hands on. He kills everyone who stands against him using the remaining three stones. Since he's on higher alert, Thor likely doesn't get a clean shot and Thanos leaves mostly unharmed. 

His crusade continues in a long and bloody fight. This outcome is much worse. People are gone forever. Years later, maybe decades, Thanos eventually finds a way to get the time stone, he has access to sorcerers himself. Once he has it he brings vision back, puts the stones back together and snaps anyway. This time earth has no clue what happened. They just see people go poof. If we're lucky he only does the half and doesn't decide to kill everyone and reshape the universe.