You said the tantrums are when he won't listen to you. Think about what you are asking him to do and make sure that you aren't asking for something he sees as too difficult or something that means a quick shift in focus. Also toddlers don't get it when we say general things like clean up. When we have older kids in care they know what that means but I sure know what it is like on days I have jut the toddlers and say clean up and they just look at me and stare. They were just following the older kids and not understanding why. It means I have to go specifically with them, help them and lead the process meaning handing the child the bin and putting in a block or too and then asking him if he can find more blocks for your bucket. Takes forever but is less stressful and turns clean up into learning with sorting and interacting......And then I vow to myself to remove some of the toys for the next day so there are less blocks or cars or whatever to be picked up thinking it will mean less mess and then never do it.
As with anything pick your battles. If child tantrums over everything then maybe terminating is a good idea as that is too many problems to work with for a quick resolve. If it only involves some things like transitions (cleaning up is a transition from play to what comes next), or over meals, or going outside or some of the other complaints other providers have posted in the past then maybe you can find a way to make that aspect of daycare less of an issue.