If Struijk had been sent off by referee Bramall it would have been a poor decision. That it came via a VAR intervention is much worse.
Red cards for denying an obvious goalscoring opportunity via video review are rare, simply because there are so many subjective considerations.
Last season, for instance, there were three - for Liverpool's Dominik Szoboszlai, Crystal Palace's Maxence Lacroix and Bournemouth's Marcos Senesi (though this was wrongly rejected at the monitor).
There was far too much doubt that Isidor would get to the ball before Bart Verbruggen. That means it was a possible goalscoring opportunity rather than obvious.
With such a high bar on VAR in the Premier League, Bramall should not have been sent to the monitor.
Perhaps when sent to the screen, his judgement was clouded because he did not give a foul. But it was the kind of situation where the referee should be rejecting the advice of the VAR.