can you give us a link to the technical data of your current notebook?
Usually there is a single bottleneck that slows down the rest of the computer, if the current computer is less than a year old and still too slow for most programs.
Identifying that bottleneck will also tell us for which uses your computer needs to be optimized, and what kind of computer you better purchase.
That said, most probably you got one of those modern notebooks where a big part of the grafic processing is moved into the processor instead of a dedicated graphics chip or a shared grafics chip.
If you see a notebook with an Intel Pentium 2020 processor or an AMD A-Series processor, then you should be very carefull - if those notebooks don't have an additional grafics chipset, then they will go down in speed as soon as you do anything complicated in the grafics area.
Another usual bottleneck is the RAM (and in that case, it might be possible to upgrade the notebook instead of buying a new one), you should not buy a notebook that has less than 4 GB (better 8 G

of RAM if you're looking for speed, especially if the RAM is shared with the grafics card...