Hi,
- Unit preservation
- MP-float (1000 mp !)
- overextended your frontline
- Mines, traps
- Fight till the end
After T4 you should have slowed down, fortificate one side, get a second ISG and move it infront of your T4 HQ for range. One or two HMGs to stop his infantry.
Put your flak-ht behind to secure your side, backed up by a raketen, not supposed to drive too much when heavy AT is on the field.
You probably already knew it but nonetheless you lost too many units. Dont overextend, know when to be aggressive and when to switch to defense.
Hope i could help, gl & hf