Breastfeeding is a nightmare

I'm in tears. The last 10 days since my baby has been born have been a nightmare for me. My baby wont breastfeed. The first day he got one good latch after birth, then struggled for the rest of the day. They told me he had a tongue tie, but pretty much just shrugged it off. I kept calling nurses in, but they were hardly any help. Then before I knew it, my 12 hours (yep, 12 hours is all you get after baby is born) were up and I had to leave the birth center completely clueless. The nurse came for our home visit 2 days later, and he had lost weight and was now jaundice. She advised me to see a lactaction consultant, so I did. The lactation consultant was manhandling my baby, trying to get him to latch and making him scream. It hurt me to see that, but I figured she knew what she was doing so I didn't let it bother me. She looked helpless for me. We tried everything. She sent me off with a syringe, and told me to try spoon feeding him my milk. I started pumping that day (day 3), and my milk has very slowly been increasing. I still dont produce more than 2oz each breast. But I still keep pumping anyways, I'm not giving up. I went to the pediatrician on day 4, and the doctor said he had lost just about a pound. She told me he wasnt getting enough food, so I resorted to bottle feeding even though I really didn't want to confuse him. I tried to latch him still, but he would either fall asleep (without ever even attempting to suck), or start to scream bloody murder. But I kept trying anyway. Hes now 10 days old, and just got his tongue tie fixed this morning. The dentist told me to latch him right after... so I tried, but of course failed because he literally WILL NOT LATCH at all what so ever. They also told me not to give him a bottle no matter what. I left the dentist still feeling hopeful. I thought that he must have just been sleepy and that I'd try when we got home. So I get home and try again and he screams. Tried for over an hour. It got to the point where it had been almost 5 hours since he last ate, so I started to panic. I don't think the dentists realize the extent of this situation! Its not just an easy task! He will NOT latch! So I caved and fed him a bottle, of course! I am not letting my child starve! I'm sorry! I tried alternating between a nipple shield and the bottle and that actually got him to latch for a few seconds. I've continued to try that over the past couple of hours, and like I said it works for a few seconds so I figure its a step in the right direction but I'm really not sure. Now I'm just sitting on my bed balling my eyes out, feeling like I should just give up. Heartbroken. When I was pregnant, I'd dream about breast feeding. This was something I wanted so bad. I feel like theres no way that he doesn't want my breast!? It is human nature. Please someone give me some hope... some insight... anything... what can I do tp make this work? why is this happening to me?