Just need to vent

My LO is 7mo 2 weeks. We've had a rough ride with reflux and milk protein sensitivity issues. This child has never been a good sleeper. Even as an infant he would refuse to nap (assuming because he was so uncomfortable because of the reflux and mps) he seems to be learning and growing well. He already crawls, sits unassisted, pulls up and "cruises" the furniture. Up until about a month ago we were up every 2 hours at night sometimes every 45 mins. I did some sleep training with him so most of the waking he does now he's able to put himself back to sleep. He goes down for the night around 8pm (it's usually a window of 730-830 depending on if he falls asleep for a nap around 4) he fights me with every inch of his soul on sleep every nap and every bedtime and when he finally does fall asleep he's so restless in his sleep. He's been waking at 5am with no desire to go back to sleep but he's obviously still tired. He's crabby, yawning, eye rubbing. I love him so much but I feel like all I do is fight with him. It's been so hard. Being a mom is hard.