I had never had a problem with the grinding required previously in Reborn, getting a Pokemon up to 70 isn't too bad.
I think my problem mainly lies in now that the Pseudos-Legendary and Legendary Pokemon are becoming available, since they have a Slow leveling rate, it is starting to seem like such a chore.
Even getting my Alolan-Ninetails up to the high 70's, to use against Amaria, tired me out.