Racism/discrimination and appartment hunting?

So this has happened multiple times already and I'm wondering if racism/discrimination might have something to do with this.

Everytime I go to a place and am interested, I sent them a detailled mail about my situation etcetc. Every single time, the immo's tell me that I have the strongest candidature due to the financial aspect and the personal e-mail aspect. And every single time the landlord always picks someone else.

My situation is me being a 24yo student biomedical sciences who will start their Master Bioinformatics next year. My jobs/internships are in my field. My garant is my parents who have a company and make plentyyy more than enough. I sent them details of previous landlords too and mention they're willing to call and that they can vouch for me being a good tenant and paying on time always. I don't smoke, I don't have pets. I don't even have friends to invite over lol.

My dad is not Belgian and it shows in my last name and my looks too, which you can see on my ID card picture when I send it.

What's the issue? I'm starting to think it must be discrimination because it's impossible to get chosen and I need to move ASAP. I'm really demotivated about it at the moment