IMHO, their sound bars aren't great to begin with. I had/have a Beam, Arc, Sub, & Sub Mini, among others. You're not missing much. I actually prefer the sound coming out of my $50 Vizio soundbar from Target.
Not all their products are poor. I also have a Sonos Move portable speaker that I like a LOT and bring on all my road trips. It's just their soundbars that are really underwhelming, even after their app-based Trueplay tuning or whatever it's called. In my experience, even a One or a pair of Ones sound better than an Arc + Sub, IMO.
In addition, Sonos's software is pretty janky and brings their whole ecosystem down. And if they ever go bankrupt, all the hardware will be bricked :( My dream setup would be decent speakers that have no proprietary app, just open firmware/APIs, that support Spotify Connect out-of-the-box but can have other integrations added later.
The only reason I still keep my Sonos stuff these days is because it's a sunk cost :( Otherwise I kinda regret purchasing them... (except for the Move, which I still and probably always will dearly love).