It's hard to be certain without logging the stats & calculating delta values every minute as some of the stats are not reset to zero following a resync or a modem reboot.
However, using your stats from this morning, see the attached comparison graph.
Your stats are the ones shown in orange.
Some of the values do seem very high in comparison to the stats from other users but the values used could be skewed/inaccurate, as mentioned above.
It does appear that your connection is affected by constant background interference (Rein/crosstalk) & to some extent, impulse noise (INP).
However, I don't think the stats explain the loss of throughput speed.
Possible explanations could be congestion (I think that is unlikely to cause such a loss), external network routing issues (maybe) or pfsense (TBH, I have no idea about that - what exactly is pfsense?).
I would recommend that you start logging your stats every minute using HG612 Modem Stats or DSLStats.
Either of those might identify patterns of interference, general noise etc.
If the connection ends up to be reasonably stable stats-wise (which I suspect it might), you'd have to look for other possible causes.
Would it be possible, even if only for a few hours, to run the HG612 as the modem with the HH5 operating as a router?
That way, pfsense could be eliminated or confirmed as the bottleneck.
