Same with Berkeley Mono, which I got the free trial version and it is a little blurry in Emacs, that kind of peculiar blurriness of fonts that have never been tested on other OSes. Most fonts are perfect on Linux, so those commercial ones might require some tweaks to be compatible with other engines, and I don't see any font designer taking the time to test on Linux.
So while I would want to support indie font designers, because of my "weird" environment, I should probably stick to the free ones that I can just swap out if they don't render correctly.
It sucks to have spent €150 for a font that doesn't render well. I don't want to ask for a refund because it might one day work on my system and ages ago I used the pirated version, which incidentally worked just fine on Linux at the time.
(Before anyone mentions my font stack is broken, I assure you it ain't, and it the closest to macOS': hidpi monitor, 2x scaling, grayscale aa, no hinting. Everything looks gorgeous, except those two commercial fonts)
The typeface designer can't fix broken/inconsistent OS rendering. Still, I would've asked for a refund so the creator is aware and could avoid other potential customers.
But I would still contact the designer/seller even if only to just let them know.
For example, my last project I used MD System from Mass Driver for the web fonts (https://mass-driver.com/typefaces/md-system) and Denton from Peregrin Studio (https://peregrinstudio.com/work/denton) for my logo.
https://foundrysupport.monotype.com/hc/en-us/articles/360028...
I use a customized set for terminal/IDE and like Aile for documents. Etoile is neat. Feels typewriterish. All covered by the SIL Open Font License.
reality check - do not expect to survive financially yourself in the tornado of modernity without a small niche to fit somewhere and security from elsewhere