Do you have any scaling?
I do not, I just tried both Chrome and Firefox and hit ctrl-0 for good measure. If I zoom out (De-scale to a negative value) it actually makes the map look better, but still not very good compared to the same on openstreetmaps.org.
As a check, this also looks dramatically better on the old UI -- so even the "non-modern" UI doesn't seem to have this issue either.
I meant like operating system scaling. For example if you use 4k monitor or something.
Looks like 1080P and no.
OK, sounds like we have a bug. I would recommend raising it on GitHub, so we don't forget about it.
Thanks, and done:
When you look at the maps on the new modern UI compared to the openstreetmaps.org version, they are very poor quality. At some zoom levels, it is very difficult to use.