Thank you for the observation!
I actually encountered a problem while uploading my photos on this platform. #4 is the sharpest of them all, but after upload over my laptop, it became blurry.
I noticed also, that quallity of the photographs posted on hive differes a lot depending of - am I looking from a phone or computer screen. Maybe should have mentioned all of this in the post, to get a responce from folks who actually know how to solve this one
Even uploading high quality photos (which took a lot of time) did not solve my problem.