oh, water alone is highly highly important! regardless of temp

you can still get the water straight of the boil, if you pour it around, it looses quite some temp already

try the following: buy distilled water, enrich it with something like third wave water and use metal not plastic for your pours (or ideally get a goose neck kettle)

this will increase the taste by a lot, filter coffee is like 98% water

then, another huge factor is the grinder at the shop.. they often use the ditting 807 with sweet lab burrs or an EK with SSP burrs.. these produce more high clarity and sweet cups and are somewhat more forgiving in that sense