time sync
core@core:~/.bitcoin$ time sync
real 0m0.416s
user 0m0.002s
sys 0m0.000s
not sure what this is showing me.
I have a very slow HDD in my system. When doing the above, it can take minutes to sync. It it would be many seconds for your SSD, I would have called it bad. At 0.4s, I can't really tell.
After thinking about it for a while my thinking at this point is I am getting somehow ISP throttled which fits the facts that initially I was seeing fairly normal progress.
That's easy to test: rename your Bitcoin Core directory and restart from scratch. If it's fast again, it's not your ISP.