If you believe that the platform is so broken that it shouldn't be used (and I'm not arguing against that, btw) then a more reasonable solution would be to only allow position-reducing trades. That would also reduce overall trading volume on their platform.
Not that I expect them to do any of this, just pointing out that 'shut everything down' is not necessarily the best approach.
If this was Wells Fargo we'd see the pitchforks. But it's a SV company so all is good.