Helmets should fit snugly.
In most helmets, the paddings are deliberately thick to clamp on to
your head.
Yes it is uncomfortable, especially if you are the sweaty
type.
I can tolerate this kind of helmet only for a short while.
I use SUPA, because it has styrofoam and very thin sponge
lining.
I use this helmet for long rides.
Not a very safe helmet, but it as the approved sticker.
Being mindful of that I ride carefully everytime.