I thought I was winning until the queen blunder, but computer says white was better all the time?

You were completely winning right from the beginning. In fact, you have missed mate in one before you blundered your queen. White was never better before your queen blunder!

No, during Ba6+ the computer said white was  +4 .

That's after your queen blunder. Obviously, white is better after that blunder. Before that you have missed many chances

Dude can you see, that move is before the blunder, also, I asked why white has an advantage, I already know they do, I just asked why, if you can't answer that or give useful advice, please stop

6 b3? Qf6 7 Nc3 Bxf3 should win for black: pawn structure

7... Bd6? 8 Bxg7 wins for white: a rook

12...Qf4 checkmates

14...Qxh2#

16 Bf1 is equal

17...e4?? loses

20 Qxh5 is a free piece

20. Rf1 is a blunder because white had an obvious winning move instead: 20. Qxh5.

Useful tip: if you are looking at the "Game review", don't.

Switch to the "Analysis" tab. There you can see the evaluations of the computer's 3 top choices for every move, and you can also try any move in any position and see what the engine says to that.

Okay sorry man! My mistake. Since your Bishop stays on a6 even after the queen blunder, I just overlooked it. Really sorry. Now, I saw carefully.

So, after ba6+ , white has an advantage of +4.9 because your knight on h5 is hanging. It's a free piece that white could have captured but he misses it by playing Rf1. Then, you saved your knight and now you have an advantage, but ultimately you blundered your queen and lost.

Oh, I didn't realise the knight was hanging, thanks for letting me know

Welcome! Have a good day 🙂

Thanks for pointing out all my mistakes

There were a lot of tactical errors in this game, by both sides, And none of them were too hard for players at your level to see, You just have to work harder at looking at the board and noticing what's right in front of you

I agree, this position looked very pleasant for black.

Here's a tip for you: never castle when you're attacking.

It's like going home to switch the stove off while you're in the middle of a warzone. It's irrelevant. Just continue striking. You were winning there.

But you granted the comeback and white had better pieces in terms of bishop pair and positioning toward your king. They often come in from both sides like raptors, and then start tearing open your position.

Hey thanks for pointing out all my mistakes, I played a poor game here, even to my standards, but you pointed out so much more, mistakes I made when I felt I was winning, even after analysis

I make all those kind of mistakes in my own games!