@Emulate: Why is the game broken in your Opinion? Could you be more specific? I for myself dislike the randomness
Do I have some bad news for you re: 5e & randomness*....
I'm finding it basically like a slot machine - because at low level it is very difficult to get a mod total than 6, which is the standard deviation of a d20, therefore every roll is pretty much pure luck. Just get used to save/reloading constantly.
The biggest 'broken' bits were discovered in the 5e playtest and we were told, by WotC, that "No DM would allow that, don't worry about it" - specifically the Conga Line of Death (once an opponent has used their single reaction for AoO for the turn, every other character can run in - attack - and then run out again) & run into LOS, attack, run back out of LOS. And because this is a computer running the game, and not a person, the computer goes "Seems legit"
Also fights are Deadly or Hard by encounter calculations (DMG pg 82) which means...whelp, you're going to die. A lot. Unless you cheese, with the aforementioned conga line of death and/or hit & run constant fallback.
* - "Bounded Accuracy" and "Rulings, not Rules" were literal marketing slogans for the 5th edition of D&D. Bounded accuracy means that, contrary to prior editions, you can never get 'too much' of a modifier to make tasks trivial and ensuring that monsters stay relevant for longer because bonuses advance very slowly and are very small. This means that most of the time bonuses are <6, which is the standard deviation of a single d20, meaning that statistically, you are at the pure mercy of the die most of the time. There are classes intended to protect against this, and you can get advantage but both methods are not currently available in BG3 at the moment.