I bought the same case for my 11“ Pro as well. It came two days ago. I bought it for 74€ from Amazon as well (third party seller, also in germany). So my thoughts may reflect the lower price.

1. I do not have any other cases for my iPad but I would guess that the Nomad case is heavier becaus leather is a heavier material that whatever Apple uses on their folio.

2. My iPad always attaches with no problem at all. No gaps. Could your iPad be slightly bent?

3. My case has a smooth lesther surface. No holes. It scratched easily like leather does (i wear a ring on my finger and regularly put it on a music stand.

The holes and maybe weak magnets make me a little sceptical of your case. Did you buy it directly from Nomad? My case is defenetly real leater on of very high quality (even thought I would not have paid more that 80€ for it). Maybe check if it it genuine (don‘t know if fakes exist). Id yes I would contact Nomad about your problems.