All modern CPUs, especially mobile CPUs which have a higher chance of overheating, will throttle themselves and kick on fans early to save themselves from thermal damage. Laptops are a very poor choice for botting as mobile CPUs are weaker than their desktop counterparts, combined with the fact that laptop cooling is much worse than any desktop CPU cooler. As a standard rule, a desktop that is half the price of a laptop will run things like bots better since they are very CPU intensive. You can always try applying new thermal paste but this won't help a ton if it was decently done at the factory and won't be a major game changer.