There's a mass psychosis going on in companies right now. Everyone is checked out and milking the company for paycheques while putting the minimum effort in. Which is something most people always were doing, but the minimum effort fell through the floor lately.
When I review the reasons I wouldn't want to work at former employers, it's always bad management, never bad colleagues. If this is what it's like where you work, you should run.
Things like bad management, disillusionment with the company's goals, worries about being automated out of a job, etc. can lead people on the floor to care less and put in less effort.