If I'm assuming correctly this is a flat-bottom-airfoil trainer type aircraft.
What were the results of the crash-what was damaged?

I experimented with my trainer years ago. I took out the 3-5 degrees of engine down-thrust with shims behind the mount. It acted much the same as you're describing. All of the engine down-thrust is necessary in a trainer due to the high-lift airfoil.

If I remember correctly, the bottom of the airfoil should be parallel to the horizontal stab.

Check the alignment of the two airfoils and adjust as necessary as described above in previous posts.
If they are in good order try putting two small washers behind the engine mount's upper most mounting bolts. Between the mount and the firewall. (One washer on each side-providing it has a removable mount and not built-in rails.)

Setting the neutral point of the ailerons 'up' will compound the effect by pushing down on the trailing edge of the wing thus forcing the tail down even more! If you go this route, lower them if anything.

Good Luck and tell us what you find!
Jeff