You could possibly put some wood there. Like attach few pieces of wooden board (or one bigger one) there -> bolt it to wall -> bolt tv mount on top of that.

Or instead of wooden board, use metal (like this). Mount it to wall from corners, so one hole in the middle will match current hole. Metal plate should help secure the current holes.

But really, I would maybe leave this to professional to prevent more fuck ups. Or just move it 10 cm higher and use mount with movable arm, so you could put the tv lower.

Edit: Or just use bigger screws.

I know you didn't ask opinion, but just wanna say: It looks cool and sounds cool - in theory. But when you need to measure carrots to fit the cutter and cut onion in 2-4 pieces to get in fit there... It just don't make sense. I had one. It could be great for making big batches of food for parties, but then the container will be too small and fill up fast, since the veggies won't spread nicely, they will just get into one end of the container.

So to use it, I needed to cut the veggie to fit the blade area, then often cut it more since half onion was too big, then shake the container to be able to fit more and then empty the container (if you fill it as full as on the pictures, new veggies won't cut as smoothly) and then repeat. So it just was easier to cut whole thing with knife and push the veggies into another container.

And it takes lot of space! If you want multiple containers to it, they won't go top of each other. So IMO, it's not worth the hassle and the amount of space it takes from your precious kitchen cabinets.