Why do I feel as if Allah doesn’t listen to me

I have made countless duas and but none get accepted. At first it was of grades then to get accepted into a uni. After I didn’t get accepted I researched on duas and figured it may have not been best for me. Then I made dua to pass in my uni and that didn’t happen I got offered another chance and didn’t pass that as well after so much dua and I didn’t just make dua I also tried and studied. I pray and ask for constant forgiveness but now I feel helpless I don’t know what I’m doing wrong or why nothing works out for me even if I have so much hope I cry to Allah but I don’t feel as if I am being heard why?