It's not Henry V and it's not a documentary of the events leading up to the Battle of Agincourt. Judge it on its own merits.
Personally, I liked it a lot. It's dark, it's not a fast burn. The acting and script aren't flamboyant but rather sparse and conservative.
I could have lived without the ye olde pre-battle speech although it did let lead actor Timothee Chalamet off his leash for a second which was nice.
The battle sequences are lumbering and brutal - probably a lot more realistic than a lot of the ballet productions used in many period pieces.
The supporting cast I thought was great. Joel Edgerton is transitioning into an elder statesman-like period and this role is a great start. Robert Pattinson is the only real disappointment in a brief but pivotal role as the Dauphin. His accent and blonde dye-job compete for the worst bits about his performance but the whole thing lacked the chicanery and arrogance I think he was aiming for.
I think Netflix has done a good job. The movie worked great for me at home but it's also cinematic enough to render well on the big screen.