art/technology

What is that?

applying to hundreds of jobs

The spray approach. The opposite of the targeted approach. He doesn't know what he wants to do and employers don't want people like that. Understandable.

these jobs in tech, gaming, entertainment industry, graphic design

What is he doing? If they are the same role across several vertical industries that's OK. But if these are actually all different jobs, what exactly is he trying to achieve? He's setting himself up for massive job dissatisfaction.

Choose a destination based on logic, then head in that direction. Commit to it. You can always correct course later. Instead of choosing a random direction, putting the vehicle on autopilot, crashing and repeating all over again.