Valorant will also be like csgo or overwatch where people will slowly lose interest in it and then a new game comes again then switches. I hope not.
laptop tends to overheat maybe its thermal throttling. Open it and clean it or go to a store and have it checked. Also, update your drivers. It would be too long if I explain everything here so just google about slow laptops and how to fix it. plus how old is your laptop? if its 4-5yrs maybe getting a new one would be the best option.