This is my 1st build so im pretty illiiterate in these things, sorry
You need to invest money at higher performance PC case with a better level of AIR cooling.
I do Gaming for 22 years up to date, my PC case never were generic but always a high end solution regarding air-flow.
Back in 2005 we were forced to modify our cases (tower) about improving Air flow by the use of SMART 120mm DC fans, with automatic speed control due their own temperature sensors.
You may discover if you have PC case poor air-flow issues by removing the side cover, and by compering the temperatures at Gaming.
MSI Ventus 1660 super ? Not the best cooling system either.
https://www.ittsb.eu/forum/index.php?topic=1598.0