Following up on your tip - towel dry in your bathtub or shower to prevent your floors or bath mat from getting wet. Helps prevent mold as well!

What’s not normal is this Orca hunting a shark alone. Orca usually hunt in pods.

Have you monitored the temperature at all? If it shuts off after 1.5 hours of gaming, that sounds more of a heat issue than power. It sounds like maybe a lack of thermal paste.

Get something like CoreTemp and monitor your CPU temps while gaming.