I honestly did not find Movie Thanos or the gems that impressive. His durability and speed was not all that . His gems were like on a weird rotation use or it might been Thanos was so over confidence that he did not bother putting all his gems to proper use. All might will reck him so hard and fast.
All might kills him if thanos does not have the gauntlet. With the infinity stones its a bit more complicated because of thanos reality warping. Than again with all mights speed and strength he might be able to just remove the gauntlet.
These anime fans always jump on to the newest thing and swears it's the most powerful best thing ever and don't realize how ridiculous they come across when they try to defend it
All Might who was severly crippled from his last major fight that pretty much allows him to use full power for max 5-8 min murder stomped Nomu and All-for One, one minor punch sends a wind storm equal to a hurricane