What are your ideas to keep winning in the Ten Card Poker Deal without it seeming confrontational and making the spectator look like a loser?
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Can you define "confrontational" in the sense of performer/spectator relationship?

Like "I'm giving you all these choices but you're still going to lose and I'm going to win" might start to seem like a challenge after one or two phases. And it might make a difficult spectator want to be extra difficult and try their hardest to mess it up.
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You can create a situation where they win. The magic is that you are in control, not who wins.

Or you can frame the presentation that you always know who to bet on. You could have two specs, and you "bet" on whichever one you want to win each time.
Or you could play the role of one of the "players" yourself, but still frame it as if you were a third party betting on either player.

I used to do this with a couple (and have her be the winner each time).

Use a lucky coin? Whoever has coin wins hand. Then they can win now and again. It’s not about winning and loosing but the lucky coins power?

Darwin Ortiz's 10-card poker deal is what you're looking for.

Mike

One way I use to alter a trick away from being confrontational is to present it as a story from my past. Maybe it was "something that happened to me" or "this guy hustled me one time". That way, you're describing events that have already happened to someone else and the confrontation can still be included, but it isn't directed at the participant.

Change the order of the deal so the spectator wins, and play it off like you’re supposed to be winning but things keep going wrong. Spectator feels good, you get some laughs, win-win.

The idea of a lucky coin (or casino chip, buy a real one used in a casino) by Stickmondoo is worth investigating.

And Levi Bennett's story suggestion is how I've done this many times.

Mostly though I present this as a unique form of poker, something gamblers have been experimenting with in the back rooms. Competitive, yes, not necessarily confrontational.

Just make the spectator win