I’m a former obstetric consultant. Apologies if you know all this already, and for being blunt:
Induction is sometimes decided on and needed to avoid the placenta failing before delivery (which could lead to stillbirth or serious disability). Unfortunately, it is - especially with your first child - a process where the outcome is uncertain.
You had already endured 3 days of an induction, which is hellish, and to endure a further day or more of established labour would have put you in an even worse state with lack of sleep/food/beds/pain.
If your baby was already showing signs of distress before starting the oxytocin drip, then starting it would almost certainly have worsened the distress, resulting in an acute risk to your baby’s safety, and a cat 1 or “crash” Caesarean. In fact, had I been on duty as the medic, I would have refused to start the drip with an already abnormal CTG.
You made absolutely the correct decision to have the Caesarean without starting the drip. This means that although your op was emergency in nature (unplanned), it could be done without undue risk and in a safer fashion.
You took the right decision to keep your baby, and you, safe!
What an absolute disappointment your husband’s atrocious behaviour is - unfortunately not uncommon for this to start or escalate when you are vulnerable in pregnancy or a new baby.
Please be careful to get as much help and support as you can from close family and friends, and don’t be afraid to let them know how your husband is treating you, without minimising his behaviour.
Please think carefully about how your relationship goes forward from now - this is emotional abuse (speaking sadly from personal experience of this).
Your language is somewhat reflecting this already ie: being grateful for him “helping” with his own child.
Wishing you all the very best, and congratulations on your new baby.
Keep posting here for support.