It seems that there is no appreciation of a good architecture/system design any more. Nobody cares.

Leadership can't tell the difference. If anything the worse designs seem more impressive. Engineers often enjoy a bad design because it creates more work and job security. When there's a lot of work it seems like you're getting things done. Managers enjoy a bad design because it helps empire building, now that there is more work we need to hire more people and do more manager-y things. There are also a lot of inexperienced engineers in the work force who have never seen a well designed system.

In an organization running these badly designed system it's a political suicide to argue the design is bad. If the business is successful even more so because everyone will assume that a successful business means well designed software. A successful business will directly reward a bad design.