Supports strategy for printing Lego-compatible blocks

As said you can try reducing the point size further and maybe deleting a few supports. However I wouldn’t expect such a messy result from my printer. Maybe you ought to be more careful when removing the supports (the center pipe in particular should come out much cleaner than this) and clean the part with IPA and a soft brush as there seems to be quite a bit of uncured resin on the part.

Blind holes are definitely an uncured resin trap and extra care is needed before post-curing to remove the resin.

Since it’s a small part I might try to squeeze it in a print in the next few days for the sake of comparison… can’t make any promises though.

If you want to remove any doubt that your printer has an issue, you can print this and post the results on send them to Formlabs to get their opinion :