Oh boy, here we go with another "Game hard so the game sucks" rant.
This is not that uncommon in this Forum, seeing how a lot of Users here just want to pleasure themselves to some pictures/ animations and having actual challenging Gameplay mechanics that require skill and brain activity is something those Users react allergic to.
Still, let me answer some of your questions and give some tips, so you might have a better chance of survival next time you decide to try the Game:
On another note, its a bad Idea to try to turn a Arcade game into a Realistic "Simulation" game, because then the people that you have been attracting before the change will cry about you "ruining the game". Trust me, its way better to go hard from the start, so people know what they will get. Also there is a ton of complicated code that could get fucked by some old arcade code that you might not be able to get out without needing to reprogram everything.
I just put my opinion.
Your expectations are your expectations, my expectations are mine.
I'm not saying that it's easy to code a game.
Otherwise I would create one myself. But when a game is frustrating I let it be known, and it's not often that I point it out.
Because you don't know how I played, it's not because I'm complaining about a difficulty that I'm a jerk as you like to imply.
( thank you I have ears and I hear the enemies

)
concerning the difficulty, there is difficult and difficult.
I take a game that has nothing to do with Karryn prison's, the game if you want to do it in difficult, you just have to know the enemies well, the edits etc. and it's the kind of game I spent hours on.
You're talking to me: the enemies have trouble with the corners, except that it's just playing on an AI that is badly coded.
On the arcade side, you just didn't understand what I wrote, unlike you I won't insult you by thinking you are an idiot.
Making a simulation of a game I don't care, if I talked about arcade it's first to make some details work and then to add all these elements of simulations.
I'm sorry, but I've never seen stealth in my life, I've learned to be stealthy by bending down, not just by walking slowly and standing upright, just to make sure that I'm seen even if I'm not heard.
when you want to do stealth gameplay, you also plan places to hide. you tell me that this is the case, but in the tutorial you are told: a but if you go there it makes noise, not mentioned that it hides you (or I read too fast)
and on the other hand we try to allow the player to "kill stealthily", so yes there is normally a "suppressor" in the game, but you have to fall on it, you don't want it to be stolen. which makes the interest of the stealth gameplay, null.
And I confirm that I got stolen stuff while I was surrendering.
I don't know about the scenario in the paid version, so I won't comment.
Finally I repeat myself, I'm not like you, I have my expectations and you have yours, don't start telling me that I'm going to bitch about something when you don't know me, have a nice day/evening.