Don’t feel bad. When I first got my SB20, I connected it just like I had my Kickr: TR connected to the bike, and power match enabled, and I couldn’t figure out why the ERG ride quality was sooooo bad. I reached out to Stages Support, and they gave me the correct setup, which made a huge (at least for me) improvement in ERG ride feel.
The original setup (using PowerMatch) had me slightly regretting switching from the Kickr to the SB20, but with the correct setup I’m 100% sold on the SB20 (especially since my wife also uses it 
, which was the original reason for the switch).
After a year, I’ve finally ordered a rockr plate - the Pedivella thanks to @mcneese.chad for the link - to fix the one thing I miss from my Kickr setup: the motion from the InsideRide E-Flex. I’m hoping the rockr plate will give me that little bit of extra comfort I’ve been missing, especially for long indoor rides. I will post a review once I get the Pedivella + have some rides on it.