Gatline -> Bryan
Naginata -> Pilzken

You're deck is really weak to SoA and has none of its own thats your biggest problem there. If you want to use cards like Naginata, Trish, and Thormund you need to make sure the rest of you're deck can stand up against SoA. I recommend you take your pick only 2 or 3 of the ability dependant cards, Thormund, Trish, Isatis, Naginata, Sabia, Dean, and compliment them with cards like Bryan, Victoria, jane ramba, Brianna, Arnie. Right now over half your cards are useless if they lose their ability. You're deck is also pretty top end heavy so losing matches where you draw 2 or 3 of your lower star cards is to be expected with a setup like this.

Junta are a great choice just possibly not this week. I have a thread on it look for "Rise of La Junta?"

As for your problem immediately I notice no Isatis she is essential in mono junta. As someone said SOA is a slight problem for you. Trish becomes terrible Dean becomes very beatable Naginata loses her purpose. I do run an SOA prone deck

Ray
Isatis
Brianna
Milena
Wyre
Dean
Thormund

You can see my guide in the other thread but again in general.

Mono Junta

Requires

Isatis
Thormund
Wyre( personal opinion)

You then build around that. So to stop SOA plowing you I suggest dropping Trish and replacing her with Wyre an Naginata to Ray (Pilzken if you can afford 100K). Gatline to Isatis because she is a must in mono. You can also so do Dean to Tolliver (preference). Other than that the deck is fine.

All this talk of deck advice is useless if it doesn't suit your style of play. Think about that before making these changes. If the deck works don't change it.

Naginata > Ray. 8/7 and 8/8 is not that big of a difference, but possibly threatening the opponent with 5 pillz is huge. 8 attack is often just one pillz.

ok mono deck: Naginata Isatis Brianna/Arnie Wyre Nahomi Thormund Tolliver Sabia

ok perfectly balanced deck.

I have to say Naginata vs Ray is preference

The way people react to her and the way they react to Ray is very different.

The way you play them is also different so it comes down to preference. I prefer Ray others may prefer Naginata

Still weak against SOA, but it's not a big deal i guess