Welcome to the club

Congrats for pushing through
Don’t let it stress you too much and if you need to talk, everybody in this thread has been through it and will lend an ear
Eh the surprise might be gone but the frustration from MC inability to defend himself or even take a simple stand will be always there.
He is unable to protect himself or even Lacey (she needs protection from herself too), going to great lengths to actually amplify the damage as much as possible (with the help of our resident monster).
Even in act 2 where we could hope for some emotional growth we still get our whiny wet blanket sort of care bear attitude.
And Lacey doesn't respect his wishes and takes stupid decisions because he can't be a pillar to stand on, he is always in need (not a justification, she still acts like an ass) and he is never in charge.
I said it once already being good because you can't be anything else, doesn't make you good, it makes you weak.
If he chose to be good while having the potential to be dangerous....well that would have been a different thing.
I am in the office today so I don't have the files with me, but iirc even when he finds the fake video, he goes there, shouts a bit and then leaves...the description of ptsd is done well, but he is still completely ineffective.
Show us that he is fed up, show us that anger that is more than posturing, so far his only victim is a phone or a slap to Lacey in punish route (where he also runs away instead of fixing what he has done, very mature).
And I don't mean to imply that he should get physical all the time(or at all), but instead of running away with the tail between his legs, stand there, send other people away, gain control, be assertive.
Face Mia, face Anna, face Barty damn it, face someone, and I will give leeway on facing Lacey and then caving because that is his weakness.
How can you let what Mia has done slide? How can you let what Anna has kept secret (tennis + drugs) slide?
Anyway, this is why L&J is so hard to read, if you try and immerse yourself in MC, his lack of ability and actions and his inherent weakness does transmit impotence and lack of agency.