This really didn’t have to be a 5 year rebuild. What should they do next?

Imo the Texans have young talent that they should be exploring in this lost season.

The DL isn't stacked but it's got young promising players in Lopez, Blacklock and Greenard and some valuable veterans like Collins, Martin and Jenkins who you can transition out of as rotational players. They need to stop messing around with you g players development like Charles Omenihu who is inexplicably not in the rotation. The LB core needs an overhaul in the draft for sure and so does most of the secondary. Reid is still promising and Lonnie can learn but shouldn't be starting at this point. Gotta find DBs and LBs and add at least 1 star level pass rusher which isn't hopeless to do in 2-3 years.

The offense needs to be rebuilt at the trenches. You either move Howard back to RT or forget about it and have to rebuild every position at the line because he just ain't getting it at LG. Tunsil only has 2 or 3 years left on his contract so you can put that position off until he has 1 year left. Britt is not the center for this team and Max Scharping has just been destroyed. WR wise, you can get away with Cooks as WR1 for maybe another 2 years, hope Collins develops nicely and then maybe look to spend a high pick somewhere down the line on another WR. TE group is serviceable although you really need guys to block but you don't need to spend high picks there yet either (btw Brevin should be getting a chance otherwise why did you draft him?). RB room is a tragedy. Scottie Phillips, even if he were as bad as DJ and Lindsay should be the 1-2 combo with Ingram.

As for Mills, he has shown quite a bit of good but also some concerning bad things and if he can't fix those bad things by the end of the year, I'm taking Corral with one of my first round picks. Also, it's clear they don't trust him. The play calling feels so restrained because they don't trust him. I'd say just let him rip it. Got nothing to lose in this lost season.

What do you want to see the Texans do for the quick turnaround (I predict I will see a lot of "fire David Culley"s and "Sell the team").

EDIT: The main reason I feel this way is because of the draft capital we could get from the D4 trade. It hinges on how well that goes down.