Yeah, this looks like the most ridiculous excuse to ask for a refund...
1. It's difficult so I learn coding instead.
Like if coding is easier than learning Playmaker, with all that hassle of syntax etc., good luck with that.
2. I don't like the interface.
It's not beautiful, I agree, but it's working and essential. Maybe not the best it could be, but it works.
3. There are no tutorials.
As users have shown, there are a lot.
I am sorry for saying this, but my feeling is that these are only excuses to get the money back and keeping the software. It will be fun when he'll come back on the forum asking for help.