[Tl;dr: Buy the game. There's plenty of ways to look for discounts if you're wary but this game is a LOT of fun if you give it the chance to let you try new things]
If you're reading the negative reviews and as a result are on the fence about buying,
Here are some arguments to put common complaints into perspective:

-No in-game save system/only 1 save file
>This game may not /call/ itself rogue-[] because it doesn't have procedurally generated maps or is a dungeon crawler but it /uses/ the "you're going to die a lot and lose progress" mechanic in order to invite experimentation, incite flexibility in the player and generally encourage you to use mechanics and weaponry you're provided with on the spot. Additionally: regardless of you dying a lot and this being a CENTRAL gameplay mechanic, in lieu of a save system, you /are/ able to retain progress after a while.
This same explanation goes for the "repetetive gameplay" complaint.
(Also, I'd like to remind the gentle reader of games like Hitman: Absolution and their predecessors, a time during which "no in-level saves" were quite common and save scumming in general was looked down upon. It's ok to do things again. Some of y'all literally have 2k hours in binding of isaac)

-Enemy AI is bad/It's too easy
>Arkane offer /a lot/ of difficulty options and you may play on HORROR NIGHTMARE ULTIMATE mode if your dopamine-fried brain requires it. That being said: This is NOT a stealth game. It is also NOT a souls-like. It is an action-FPS which is supposed to be /Fun/ and perhaps at times /Challenging/. Arkane deviated from their stealth approach to try something new. I'd also like to add that ♥♥♥♥♥♥♥ enemy AI in the vast majority of action-FPS is dumb as rocks and nobody is ♥♥♥♥♥♥♥ complaining. Are we moaning that DOOM:Eternal AI are just shootin' and tootin'?

-I don't know what to do! Who even is everybody? The story is so confusing?
>Arkane make Immersive Sims. You not knowing wtf is going on isn't just intentional, they've managed to implement narrative amnesia into the gameplay loop this time. You're /supposed/ to experiment, you're /supposed/ to piece things together - by reading notes, sure, but there's also so much dialogue and enemy voice lines that clue you in - if you're willing to listen and follow the leads. I also vastly disagree that the antagonists aren't properly characterised, I've rarely seen a game handle a cast this big without characters being vague "we're the badddd guys".
This isn't a ♥♥♥♥♥♥♥ JRPG with 2 hour cutscene after every time the protag scratches their itchy balls.

-Stuttering, crashes, etc.
>I'm running this game on a potato with a Radeon GPU that existed before your grandma first heard about sliced bread, so I really don't know what's happening on other people's builds. There's also an /extensive/ graphics menu to adjust ♥♥♥♥ until you can't count your framerate on two hands anymore

-People reviewing the game without having played PvP
>Why.
This game has a delightful PvP that is for once not (utterly) riddled with hackers, and that /may/ entice certain people to dip their feet into PvP at all because they're too nervous, have had bad experiences, etc. The PvP has two modes and it /always/ means you against just one other player. You can chose to be hunted (which still means you're massively advantaged) or hunt the protag with a different skillset for a challenge.
These are the same type of clowns that complain about video game journalists not 100%ing games

-Dishonored stans complaining it's not Dishonored/Idiots complaining they're using mechanics from the Dishonored line
>Either of those people are dumb. This game officially is set in the Dishonored universe (so you'll find cool easter eggs and references), which is why a /fraction/ of mechanics are re-introduced. Just like mechanics are copied across all kinds of games, certain staples like Blink show up here. Is everybody suffering from collective amnesia about that time every AAA had a ♥♥♥♥♥♥♥ grappling hook or am I hallucinating? What kind of ♥♥♥♥♥♥♥ complaint is that? This game is CHOCK FULL of mechanics you ain't even SEEN before and there's literally these tricycle-brained wojaks complaining about things showing up in other games - what like SHOOTING A GUN and RUNNING AROUND A MAP YOU ♥♥♥♥♥♥♥ IMBECILE?

Personally, I loved Arkane trying something new, the setting is stylish, the music is bouncy, the gameplay loop is loopy and the voice acting is some of the best I've heard in the last couple of years. Does it have issues? Yes. Is it Mass Effect: Andromda? ♥♥♥♥ no, so go ahead and treat yourself to some groovy shootin' times!