New Viessman 100 not satisfying thermostat

I have a new unit with outdoor reset, 2 FHW zones in a 60s 1500sf raised ranch in Massachusetts. No heat loss calc was done. The unit was doing fine when I had the house at 45 while it was open for renovation, but now I'm moved in and want it a touch warmer. Tstat is set for 65 but I can't get the 2nd floor beyond 57. The display indicates a water temp of 137 and I can hold my hand on the supply pipe for 2 secs and return pipe for about 6 seconds. I bumped up the unit's temperature from the factory 68 to 74 with no change. Tankless DHW is fine, showers are great.

There is a variable speed Grundfoss circulator on the primary loop and it's in Auto mode, displaying 9w, 1 gpm.

The house has marginal insulation, r-8 in about 75% of the walls (the other 25% are empty awaiting blown in cellulose) and the attic insulation is missing in a few places and very compressed in others. Windows are new and most drafts are sealed but not all. In my opinion it has too much baseboard, they just ran it along all the long walls. Yet it seems like not enough, or it's not radiating, given how hot the return pipe is at the boiler. The pipes leading to the baseboard are hot but the fins don't feel hot at all. I vacuumed them and they're free of debris.

I'll call the installers in the morning but hopefully someone has some insight so I don't freeze my as soff again tonight, or even discussion for me to read while I can't sleep.

thanks,
jim