Sounds like you're rushing a bit too much, no offense.
Doing well on HCTDM is IMHO about knowing when to rush and when to hold position, observe your team and be aware of spawns. You sound like the guy who always runs back for the revenge kill from the same direction and fails, again, no offense.
HCTDM is much faster paced in here than it was on MW3 but you still need to be a bit more cautious.