I have this same machine & it is actually very good at all those things. Your machine might need servicing but the most common reasons for it to misbehave is dull or bent needle, needle not in properly, something not right with the threading.
I have found it does best with a Stretch Needle (it has a longer scarf), make sure the needle is placed in the right direction and when threading thread through all 3 holes & have that extension wand at 1 st all the way up & loop directly over the thread spool.
When ever mine starts skipping I change the needle & check threading, it returns to doing well.