Understood. Unquestionably the most frustrating thing about a SmartThings platform is when you have something which is worked great for months or even years and then it stops working.
I am facing this with the intentional removal of a feature which was the whole reason I came to home automation in the first place: hands-free operation of a smart lock. unquestionably the most frustrating thing about a SmartThings platform is when you have something which is worked great for months or even years and then it stops working.
I am facing this with the intentional removal of a feature which was the whole reason I came to home automation in the first place: hands-free operation of a smart lock. 
As far as where else to go, different things work for different people. And it depends very much on which exact devices you currently have. You can find a number of conversations in the forum about various options. Here’s a recent one: