Help me understand positional analysis?

Here's my recent game that I think went well all the way through. From this position here I expected to win a rook, but he blundered his queen and then resigned. I would have too. But I'm confused about the resulting positional analysis. I think I am in a good position because of the following: - he has castled queen side and I've amassed a good collection of pieces over there - my king is safe off the back rank - his light squared bishop is pretty much locked in - his a pawn is very vulnerable So given that I'm a queen up, (value 9 points?) - is the engine suggesting that blacks position is actually better? Before him moving his rook I was +0.72, and after I was 7.72 suggesting that the gain of the queen was at some cost to my position, even though my plan to attack a7 is now even more advanced?

How is this the best move and not a blunder?

"Threat to win a pawn"? I'm loosing a knight! I've checked out the suggested moves and they make very little sense - I can take the b pawn and pin the knight, but really didn't find any good way of capturing it, plus the pawn on a 6th file is a lot of trouble...

A simple one, yet still proud, yeaahh...

First quadruple fork for me

Reset the counter

Quite proud of this one

"Why didn't the timer stop? Where is winning buzz?"

I lol'd

Frustration when someone resigns and denies you a smothered mate

When would you accept a draw?

Opponent declined draw when I was up 3 points of material. Declined again after I was up 5 points of material. Why? I offered a draw because I got a notification reminding me of my appointment so I wanted to get out of the game quickly without resigning. I figured he would accept. Would you accept the draw? I ended up winning the game a few moves later and had to rush to the car.

Brilliant move (50

Quite proud of this one

I’m not so much a beginner anymore more of a lower intermediate (that’s what I like to tell myself at least lol), but proud of this nonetheless