2017 MacBook Air Gets Hot Too Quickly/Loses A Lot of Battery

My 13-inch 2017 MacBook Air (MacBookAir7,2) has been recently getting hot way too quickly. There are times when my Air on the north housing part of the keyboard by the vents are hot (like burning hot). Sometimes if it gets too hot, my keyboard is also hot too. Doing simple task, my Air get’s too hot. If I watch a Youtube video, it get’s hot. If I have two tabs open, it get’s hot. I also noticed that my battery has been draining way too much quickly. When I charge my Air, it charges super quick too. This has been pretty recent for the past few months and I’m not too sure what is happening.

I bought the Air new back in 2018, so it has been doing pretty stable. However, I noticed a few things, but I can’t tell if this is what it getting my Air to get hot quickly:

• My charger that originally came with the Air has developed some yellowing over the years. The charger also gets (burning) hot when charging my Air and the cord that is yellowed also gets hot (but not burning hot).
• Because of quarantine, my Air is my only laptop for school so I had to run a lot of heavy applications which would run hot only when I ran those applications at that time. Much of the applications were more suited for a MacBook Pro than an Air (considering that the Air isn’t meant to handle a lot of those heavy applications but I didn’t have a choice at the time).
• Those heavy applications have taken up a lot of my battery when I would run it and I would have to charge my Air almost everyday—sometimes two times a day even at 100%. It should be noted that my battery charge cycle is right now at 857 which is close to the capacity of the maximum charge cycle for an Air which is 1000.
  • System Information says this: Full Charge Capacity (mAh): 6329/ Cycle Count: 857/ Condition: Normal
• I’ve noticed that my fan isn’t working as it used to. If it got too hot in the past, it would spin to cool my Air down—even with the heavy applications running. Now it doesn’t even spin to cool my Air down when it get’s too hot.
• I never opened up may Air, so I’m not too sure how dusty the inside is.

I say burning hot because I cannot even keep finger on the area for more than a few seconds. I know the parts of the MacBook Air, but I’m not as knowledgable with the science/coding side of things. What could be the cause of this? Is my battery draining a lot because of the way the Air is heating? What would I need to change? Battery, fan, thermal paste, etc? Let me know. Thank you!

EDIT: As requested, here is the CoconutBattery screenshot.