You're caught in a hard loop: you resent how much falls on you, and then you feel guilty for resenting it. That guilt is convincing you that good moms don't feel this way, but they do, all the time. The resentment is data, not a verdict. It's telling you something needs to shift, maybe the load, maybe the help you'll let yourself ask for. Grace covers the bitter days too. You are not disqualified.