Kid refuses to go to kindergarden

So here's the deal. My almost 5 year old little girl has always been a bit difficult to deal with. She's emotional a s strong willed. And I've always been very close to her. We have strong connection. She has had crazy tantrums for at least 2 years now. I've tried everything with her. Usually her tantrums manifest in anger. She throws herself on a floor, screams bloody murders and hits. She only hits me though. She is often angry,whiny and straight up refuses to do what I ask her. I used to just try to get trough them with calm voice and mild punishments like taking away screen time or no sweets and hope she grows out of them soon. But it seems to get worse. She doesn't really want to talk to me anymore. Yesterday morning she refused to go to kindergarten. I dressed her like a baby. When I got her dressed we were both crying because I hate fighting with her, she can be the sweetest thing if she wants to. She ended up going to kindergarten with happy mood. Also, they say she's the happiest little girl in kindergarten. No problems there. And she says that she loves kindergarten and she loves her friends and teachers. But refuses to go in the mornings. Today I didn't have time or energy to deal with her so she didn't go. She stayed in her room screaming and crying. I tried to talk to her yesterday, she just doesn't know what's wrong. I tried to ask her if we can make the mornings nicer to her like maybe it's too stressful.. (I have 2 more girls. 7years and 4 months so mornings are busy) I just don't know what to do. Those tantrums are getting so out of hand and now I seem to lose the connection with her. It hurts me. I just want to help her. I feel like I've failed her via /r/Parenting https://ift.tt/2QqzqPo