It is, however, the necessary conclusion of Arminianism. That they themselves don't go there is only the result of inconsistency. Actually, some do. They're called open theists.
And even if, through an internal block keeping them from blasphemy, they don't follow their beliefs through to their logical end, unbelievers will. What answer can they give to someone who sees the god they're teaching and draws the obvious conclusion that they worship a cosmic failure?
What, then, is the "necessary conclusion" of Calvinism? I think it would be that we are all just puppets in God's little theater, with God up there pulling the strings and us having no say in the script. Which is espically frustrating when you know that, because God/Puppetmaster chooses a few special puppets before the show even starts, these certain puppets can flub their lines as much as they want and still make it to the aftershow party.
Well, if I have to choose between a God who is a failure, but at least shows His love to his creation by trying to help (as you put it, and for the record you are wrong, but here we are), or a God who is just a big, bullying puppetmaster, I'll take the God who is a failure every time.
My own father failed at a lot of things, but I always knew he loved me. And, because of that, I love him. I'll take that over anything, anyday.