I liked the trailer for Tenet. Critics are saying the film is good, but not better than anything else Christopher Nolan has done. I don't know if it's not as good as they hoped or if they are comparing it to Inception, but I'd still like to see it.
Other critics are sharing that the film is okay, but not worth going to see in a pandemic. I think the film will have great acting and a great plot. It will be visually stunning, but it might drag a bit.
I say see it anyway (safely). Form your own opinion because even critics get it wrong.