I liked it and so did my mom and my girlfriend. Same complaint though, it's hard to follow at times since the guys seem similar. Some hollywood BS is thrown in.
I never felt like they misled anyone with the racism aspect attributed to hanks. Only thing I saw was a comment about the war in the pacific being more "personal". The show actually shows good and bad from both sides all of which are accurate enough.
On the technical side of it, they screwed up big on a couple of things. The average person wouldn't know or care. For me though, the Japanese night attacks were just "not right". They were rapidly firing their bolt action rifles while charging the American lines. I have never heard an account of anything like this. Typically the Japanese did not fire at all and tried to sneak in close before making a bayonet charge or they fired basically in volley and then made a bayonet charge. The other technical issue I saw was the Japanese soldier who pretends to surrender then blows himself up when the Americans get close. He simply pulls the pin on his grenade and it goes off. The Japanese only had one grenade that worked that way and it was chinese so very unlikely to show up on an island early in the war. I heard lots of complaints about the U.S. gear but I will let others address that.
I own firearms not to fight against my government, but to ensure I will not have to.