Assuming that you're correct and it is a monoculture plantation, they did not remove trees to make space for planting other species, they removed trees to make space for a data center.
If the translation is correct, Finland converted about 14,000 hectares of forest in the 2010s per year (without replacement), and cut about 173,000 hectares per year in general (with replacement).
I suspect how much people think this was an honest mistake with their 330 hectares (apparently following the forestry rules but missing EIA) will depend on people's priors.