My Razerblade 15 is thermal throttling significantly

I've had this product for about a year and a half now, the specs are a intel core i7 9750H and a rtx 2070 max-q. whenever i play ANY game, i always put it on the lowest settings, as i understand that a laptop will not be as good for performance as a desktop, but even on the lowest settings my razorblade thermal throttles within 3 mins of me booting the game up and the fps drops to 10-20. i keep my laptop very clean, and i never play any games whist the laptop is unplugged, i have also undervolted the laptop and i have reduced the power the the CPU to 99% to stop the intel turbo. The temps of the CPU under 20% load goes up to 95-100 degrees Celsius, and I just don't know what to do...