Looking for some criticism This is my 3rd leather project, it is a clutch for my wife. I did a bunch wrong and any advice is welcome.

2- messed up the edging on the inside of the inset, edger dug in to corner and got uneven cuts.

Sometimes edge creasers can be sharp on the corners - they shouldn't be. If you are feeling confident then a little rounding on a stone before polishing may be needed. A creaser should never be able to cut or scratch leather.

3- after messing up the inset I was afraid to mess up the zipper opening and left it just cut.

See above

5- I used the ball end of my burnisher to over the parameter of the bag to shape it out a little and the leather started to crack and lighten.

Looks like the leather you are using has a slight pull-up effect from the oils and waxes between the fibres.

6-used spray adhesive to glue down the liner so it didn’t soak in the fabric, not impressed with the feel inside the bag, thinking a soft leather liner would have been nicer.

Yes, a soft suede or skin would be nice.

7- stitched a pocket to the liner and its not really tight to the side, really don’t like the liner other thank the pattern and colors.

fix better material maybe.

Yes, or leather

8- the decorative corner piece is glued and stitched but I’m unsure how well the edges will hold down.

You will find out! Probably fine to be honest. As long as you beveled the edges well, it shouldn't catch on anything.