After binging all 6 seasons in a span of a week I have a lot of thoughts on this show first of all if this review were based on pure enjoyment it would get 5/5 stars, but some of the writing choices and later seasons weaken it.
The change in the writing style after season 4 only became more and more apparent over time which influenced the captivity of the show. And overall the writing of the show could have been better, there was a lot of lost potential.
~ Spoilers
Two examples; instead of killing her off keeping Grace alive and having her more integrated in the gang and acting as a spy for them and actually making Michael the formidable nemesis to Thomas like he was built up to be ( throwing him in prison for the majority of season 6 did not help the dumpster fire of a season)
Another aspect that ruined the enjoyability was the inconsistancies of the characters like Arthur and Polly, one episode they were calm and reliable and the next they were breaking down and losing their minds
I could go on and on about the little flaws in this show (Thomas's neverending hypocrisy if you needed another one) but honestly forget about the flaws, go ahead and watch the show because all the actors put their all into the roles, the amazing cinematography, Thomas Shelby is a reason himself, and of course all the cool gangster stuff. This isn't english class no need to analyze and rip the script apart.
And as a finishing touch- despite all the conflicting themes in Peaky Blinders it portrays a strong message about how in this society, no matter how high you get, how much money you have- your class, race, identity, and where you started will always determine how you're treated