Laptops are always really finnicky when it comes to CS since CS is primarily CPU-based and that is the part most laptops, especially old budget laptops are lacking in. A lot of CPU's in laptops are some weird one-off edition of a normal desktop CPU and are almost exclusively made for that specific laptop. They are severely underpowered and that's why shitty desktop users usually perform better than shitty laptop users. This is also why you can't really ask wether or not other people have the same problem unless they have the same laptop as yours or at least the same CPU. It's also possible that your laptop itself has a cooling problem with it's CPU and that you need to clear the exhaust & fans and re-apply thermal paste. Of course NVMe M.2 vs SSD vs HDD vs Hybrid Drive also matters in this equation and to a certain extend so does your RAM size as well as speed. It also matters what clock speed your CPU is set to and seeing as it's an old laptop we're probably talking about 2.5GHz or lower, you can artificially try to increase this in the BIOS if your CPU allows overclocking but this is of course at your own risk and might damage your system beyond repair but it might squeeze out a few extra frames at the cost of your system's lifetime.