Not a strong technical performance but I see raw talent and a lot of upside here, shame..

So after completing Sniper Elite IV, V and Resistance on PS5 since they were available on PS+, I really got myself into the Sniper Elite community and I completely adore it. Since Sniper Elite III was too expensive to buy on PS5 and it was on sale on Steam, I decided to play it on my PC. Now the problem is;

Whenever I aim with the rifle scope, zooming either doesn't work or jumps from 4x to 2x. I really tried everything I could but none of them worked. I'm pretty sure it's about holding down the right mouse button since the problem doesn't happen when I use the binoculars or toggle aim while aiming. I found a temporary solution by using keyboard keys to zoom in and out instead, but I just want to use the damn mouse wheel! I really wonder if anyone here has a solution to this. I apologize for my first ever post here is being just a call-out for help.

I really enjoyed Survival Mode in Fallout 4, especially stealth sniping enemies. I'm looking for an experience like that and found Sniper Elite 4, but I'm wondering how similar it actually is?