The slant is a non-issue. However, I'm not a big fan of that pleated flex pipe as it tends to collect gunk over time and could get plugged in a worst case.

Did you notice the slant in the pvc pipe below the pleated flex pipe? That’s fine too?

I'm not seeing a slant.

Some more photos

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Ahh. This could be an issue because the drain in the wall appears higher than the drain coming out of the garbage disposal which means the garbage disposal could always have water in it. Obviously can’t tell for sure.

Yes, this upward slant on the drain will keep water standing in the bottom of the disposer. Had a house years ago where the disposer failed because of similar standing water. The best solution would be to open the wall and lower the sanitary drain T fitting so things drain downhill.

"The best solution would be to open the wall and lower the sanitary drain T fitting so things drain downhill."

That can usually only be done cost effectively if the drain/vent lines in the wall are vertical.