The chair won't tip over, am I dumb or is there a trick?

I don't think it's possible to tip over the chair in 2.0, it only seems to work on Pre 2.0.

I found a way to tip it using the boxes in the corner of the room, should I upload my run as a current patch or pre 2.0???

I would just un-patch the game but it doesn't seem possible with digital PS games

It depends if your run is on the current patch (2.0) or Pre 2.0. You should upload the run to category with the same patch as you've played the game.