browning at a cut or damage is normal ... just part of the drying of the tissue ..

it looks like its planted a bit deep ... that might be why the new leaves look so small.. after struggling to get up above the high media ... can you just flick some of the excess out ? ....

a green stem can process light into energy .. so leave them .. that was the proper way to remove an ugly leaf ... eventually .. as new leaves are created. these stems will brown.. and you can gently pull them off ...

its not a baby.. its a plant.. water it properly.. and dont love it to death ...

i presume the pot has proper drainage ... though that media looks a bit wonky ...

ken

You haven't posted a pic of the entire plant. It appears to be a healthy plant not needing too much intervention. The smaller leaves seen in the pic appear to be the older ones. I suspect the newer leaves that have been cut had some mechanical damage. Show us the newest leaves; I expect them to be much larger based on the visible petioles.