I was really looking forward to this game as Doom 2016 was excellent. However, I'm really not enjoying it.
I have a similar opinion as @J4MES OX4D
The ammo is REALLY sparse in this game and all of the enemies are bullet sponges. Leading to me constantly running out of ammo. In a fucking SHOOTER!
You can enter an area and suddenly a bazillion enemies are on you and you're just totally fucked.
The chainsaw, for some reason, can only kill the small enemies. In the 2016 game it was a kind of panic button if you were in the shit with a big enemy next to you.
The platforming is a fucking nightmare sometimes. It's more trial and error where you jump to a platform that will fall and just hope you can see where to jump next before you fall to your death.
To me this is just a massive disappointment.