Review Detail of Athinsin in The Sorcery Academy: I am Invincible After Getting Treasure Chests Everyday

interesting idea the mc has to hunt chests to get his golden finger but there is a wee bit of a problem with this story split up into three issues. Issue one the chests are split into grades which i believe are bronze, silver, gold, crystal, and like three more after that which i cant remember. now the issue for this is that there is no actual distinction between say bronze and gold for example since all the chests just seem to give out some good stuff and the one crystal chest we saw seemed to be fairly lackluster in my opinion. My second issue with this story is that we are getting mary sue'd in the most obvious way possible, our mc was fight against an earth mage and the mc's fire was pretty much useless (blegh another fire mage) so the system pops up with a bronze chest IN THE MIDDLE OF THE ARENA!!!! and gives the mc the earth disintegration spell (see what i mean about the chest grades not meaning anything?) which he then uses to win the fight. When the next time our mary sue is going to lose a fight the system suddenly pulls out a emergancy mission to defeat the opponite and gives out a temp spell to win with but my question is this....... WHEN THE HECK DID MISSIONS GET ADDED TO THE SYSTEM??????? My final issue is more of a pet peeve then anything but we came to this story thinking about an op mage, so what annoys me about this is that the mc doesnt even cast spells instead the system does "there are no fire mana particals in this are so I cant cast fire magic. Wrong i will just have my system somehow manifest fire oarticals so i can use my spells." or "im a fire mae so i have horrible control over the fire particals. WRONG the system will perfectly control the particals no matter the situation." In total we have an mc who is supposed to be confusing because he keeps going to random places but instead looks like a disrespectful idiot, and the system who is the real MVP along with also being the real mage