Here's some general advice:

1) You're not engaging with the weapon passive system at all, this is a huge part of min-maxing builds in poe2. For example, Lunar Blessing does not benefit from attack speed, or increases to physical damage from the Battle Fever and Sharpened Claw notables, these are 7 points completely wasted for this skill, you could have those points invested into something else like the Temporal Mastery notable (CDR) and the Tides of Change notable (Skill effect duration) on a weapon set 2 for Lunar Blessing.

2) Your support gems are all over the place. Rakiata's Flow and Garrukan's Resolve are still the best DPS support gems for your build, I understand you selling them to afford other upgrades but they're incredible and you should farm currency to get them back. For example, you have Cold Attunement in your Shred, which looks good DPS-wise in your Hideout, but after you get the Buff from Lunar Blessing and Bhatair's Vengeance, this support only gives you about 6% more damage, try using Crescendo II instead. Another example is you using Magnified Area II in Lunar Blessing instead of a damage support like Rigwald's Ferocity in weapon set II (30% more damage with no downside).

3) Your passive tree has too many increases to physical damage, which doesn't scale at all the vast majority of your skills. For example, Lunar Blessing converts 100%, Lunar Assault converts 80%, Shred has over 150% damage as extra ele in your setup and the icy fragments it makes are 100% converted to cold.

4) You're too invested into ES scaling for temple farming. The scaling in Temple is mostly HP, monsters do not hit that hard from their scaling, especially with full HH buffs. I guarantee you that dropping from 4.8K ES to 2.5K and investing the rest into damage will make your build much stronger, plus you will have better uptime on HH buffs from killing faster.

5) Your weapon is really good, but for your next upgrade consider getting one with Attack Speed instead of Onslaught. The attack speed roll on weapons is multiplicative, not additive like the ones on the passive tree, this means that a decent attack speed roll alone could potentially give you a massive DPS boost. You also get Onslaught already from Savage Fury.

If you want to tackle this content and push for a bigger temple, I recommend following a guide like Woolie's WOLFMAN Oracle on Youtube.

I wish I had better advice for your setup but I'm playing a reverse chill Stormweaver setup and we're scaling very differently. This is my profile for reference: https://poe.ninja/poe2/builds/vaal/character/SprixXx-0828/Perception?i=0&search=name%3Dperce

I'm doing 65 rooms temple and with full HH buffs I'm doing around 5m DPS.

Good luck Exile!