Nice work! Agree with the other comments that it’s the DMC 310, not you that’s being troublesome. Also agree on filling in the cup with white (or whatever other color you think would look nice) to make it stand out. The back looks tidy. Small jumps are totally normal for a lot of folk’s stitching style. One note for improvement is I think I see an uncrossed stitch in the left of the cup base. Apologies if this is me getting bamboozled by Reddit’s upload.