I haven't read the whole thread, OP, so apologies if I've missed a lot of further detail.
Just focussing on your first post, & the issues of how to phrase things, have you used the word that you use here - "uncomfortable" to explain to your wife how you feel?
"I feel uncomfortable when you flirt with other men / leave me in the bar / get so drunk every time we go out. I'd like you to stop behaving like that, or I'm not prepared to go to bars with you".
Or: "I'd like to go to a restaurant instead of a bar, because I want us to spend some time together. I don't like being left by myself in a bar".
"I'm not prepared to go to a bar with you unless you're going to stay & talk to me, not go off chatting to other men".
"I find it embarrassing & hurtful when I'm left on my own in a bar & you're chatting to some strange bloke".
"I don't want all my evenings out to end with having to take care of you because you're drunk & incapable. This needs to stop".
I don't think any of these types of statement are aggressive. They're stating your feelings & position clearly, & marking out some boundaries. Of course, tone of voice & manner are pretty important, too (stating the obvious, I know) - so I'm assuming you'd be making these statements clearly & calmly, not shouting in your wife's face.
If your wife accuses you of starting an argument when all you've done is tell her how you feel, or stated what you're prepared to put up with, I guess you'd have to clarify & say something along the lines of: "I'm telling you how I feel; & there are some things in the way you behave when we're out that make me really uncomfortable / unhappy. I know I can't control what you do, but I'm not prepared to sit around in a bar while you do x".
If my husband behaved like this when we were out, the bottom line is that I'd stop going out with him. If his need to flirt with other women / get drunk whenever we went out was a higher priority for him than spending time with me, I think I'd be reevaluating our relationship. And I'd feel a bit manipulated if he accused me of being argumentative IF I really just had stated my feelings clearly & assertively.