The game doesn't know if you crashed because of forces outside of your control rage quit.
Well, whether or not the DC was intentional the impact on your team is still the same.
If you crashed on the agent select screen, well, the other 9 people were forced to wait 90 or so seconds before being put back into the match making queue.
The game doesn't know if you legit crashed or just decided to alt+f4/end-process because you didn't like the team comp.
If you crash in game, they don't know you didn't just rage quit.
The system specs for Valorant are pretty lenient, running just fine on my GTX 960's.
The only other thing to check would be your connection. Are you playing on ethernet or WiFi?