This is not the worst film ever, but it is let down by a low budget which comes across very early on and stays with it throughout. The CGI is very obvious and dated. Acting is wooden and the flow is pretty staccato in places. Props are even worse.
The story itself is quite compelling and you tend to stay with it. Given that this was probably also affected by the writers strike and the various problems over the pond it is not a bad effort. That Amazon has it on Prime is a good excuse to watch it.
Not everything is Star Wars quality filming. And that is the issue. Audiences have come to expect better CGI, better CSO and better writing. Give this a chance. There are a LOT worse that are out there!