I think that it is a couple of things not really going well for you. One of the more obvious ones is your spear, it's dps are pretty low and, more importantly, it's only got 5% crit chance. Lightning Spear is a crit build, we scale crit damage and use Garukhan's Resolve. Getting your Crit Chance to 50% is a relly big damage boost. On your tree you're missing a couple of important crit chance and crit damage nodes as well (which you could get easily by speccing out of the relatively bad companion damage nodes).
Another BIG ninja damage booster is Rakiata's Flow. I don't really feel it when mapping, but against bosses and for your PoB/poe.ninja stats it is insane.
I imported your build in PoB, added 5% crit to your Weapon, added Rakiata's Flow and specced into a few crit chance nodes to get crit chance capped and violla: 350k dps.
Here's my build for reference, it's not perfect but pretty good I think:
https://poe.ninja/poe2/profile/BundesHeinz-7437/character/WantedForTaxEvasion
PS: I can't imagine this mix of ES and Evasion you're going for is any good.