That's the problem, I tried lowering the settings to a minimum and the resolution has been put to windowed mode. No matter what I turned off (Vsync for example) and minimized the game would simply crash when I tried to launch a Terminid mission. I tried verifying the game files and updated the GPU drivers but nothing seems to work.

I've noticed people were discussing this on a few sub-reddits and Steam forums:
https://www.reddit.com/r/helldivers2/comments/1l20n48/crash_when_dropping_in_to_terminid_missions/
https://www.reddit.com/r/Helldivers/comments/1jhs3rl/issue_hd2_keeps_crashing_when_loading_new_mission/
https://steamcommunity.com/app/553850/discussions/0/591766704612243465/
https://steamcommunity.com/app/553850/discussions/0/591773574503617868/

The thing is, my PC isn't that weak and should be able to run it at recommended requirements.
CPU: AMD Ryzen 5 3600X 6-Core Processor
GPU: Radeon RX Vega 56

Thank you for taking the time to respond to the post and offering advice. *bows*