Couldn't disagree more.
1) There was next to no evidence that Germany would 'throw the game' to France. If every time an ally left himself a bit exposed, the assumption was that he would 'throw the game' - that would be stupid. Moreover, Germany was forced into leaving himself exposed because you propped Russia up. Had you not done that, Germany would have been in a position to not be exposed to France.
If anything, your actions facilitated the French solo push that almost resulted in a solo. In fact, a correct French guess at the end had the solo in the bag.
2) Had you stabbed Russia, you would have got way more centers rather than sitting static for 6 years. With builds pouring in fast, and armies in Rumania, Sevastopol and eventually Galicia - you would be in a much stronger position to eliminate Austria by surrounding him and perhaps use the fleets to push on against Italy.
Certainly, had you stabbed Russia - I would have considered stabbing Italy (as I made clear multiple times, including by taking Trieste)- AI fighting was basically ideal for you as it would put both me and Italy on the chopping block for you. You kept hoping that you would just wing it (for example, through your ridiculous counter offers to me) - but you failed miserably at that, and better diplomacy to encourage A-I war by stabbing Russia was the way to go imo.
You don't get to solo by staying static for 7 years and not doing jack shit. The bottom line is that in 1902 Winter, you expected the next 7 years to be much better than they were - so you were basically wrong. Had you grown and got into better overall positions, you would have greater strength and greater diplomatic leverage - and a solo would have definitely been on the cards with a stronger Germany holding off France. The only way to 'flip Italy and Germany' onto France was to stab Russia - not doing that was the wrong choice. Instead, you turtled and stayed in the corner, essentially feeding off our mistakes, risking a French solo, and ensuring yourself a draw rather than a much better result.
3) There were many mistakes that AI made. Had Russia fallen before we committed errors, its entirely possible AI would have advanced on Turkey.
Had that Turkish army been destroyed whittling you down to a solitary army, its entirely possible you would have been pushed back further.
Lets not forget - For the most part it was never in Russian interests to stab Turkey. But Russia *did* turn on you when he thought it was in his interest. If he had turned on you when you were down to just one solitary army - you were fucked. to put it mildly...
I think Turkey made a bad decision to not take Russia out and got very lucky. He made one or two brilliant defensive moves - but he also got very lucky with multiple mistakes on our part - He ended up almost giving France the solo, and also ensured that he never had the chance to solo himself.