What do you want to do? If you could wave a magic wand and breastfeed without any difficulty, or formula feed from birth without any guilt? (not that anyone should feel guilty, but such is our weird culture)
If you want to breastfeed, maybe a debrief of your previous experience would help? Amy Brown writes about breastfeeding grief and trauma and she has done a few podcast interviews about it.
I hear that you say you had support last time and it didn't help. I don't know if this was just NHS support or whether you hired someone private whose main job is breastfeeding support (I guess since you said you spent a lot of money, perhaps it was this). If your last baby was born during the pandemic, was the support remote? It can help to have someone physically with you helping you make small adjustments to posture, positioning baby for the latch etc.
And I agree with putting a limit on it (time, budget, feeling, whatever feels right). I think this is a sensible approach. It means you have a safe space to try out BF without it feeling all or nothing.
OTOH if you don't want to, then don't. It's nobody else's business. Your LO will thrive just as your first has. Your mental health is important too.