The Inferior ancient PC

I was around 8 y/o when I got this PC, however, It came in pre-built and it was around $400 dollars when we bought it. Never used it for gaming, I'd desperately try running "Exceptionally low end games" on a very windowed-screen, and would generally get around 50 fps with Small window + Lowest resolution as well as overclocked it at highest speed. I used to play games like Roblox, Agar.io, and so on, but then moved on after the PC itself began overheating (90 F) and it would ceaselessly crash so I had to keep the case open constantly to get the most ideal airflow. As years went by, the PC began running more slower & slower and the date of death is expected to be anytime soon, nevertheless, it's entirely mind blowing how it's still running after 6.5 years. There are numerous occasions that occurred in those 6.5 years, however it'd take days to write down every event (Power supply burning is one of them). When I turned 14, I got really interested in programming, and began learning C++ about a month ago. Currently I do typical programming as well as reverse-engineering, and obviously school work. I have never upgraded the parts, it’s still the same, the only thing I changed is the monitor, the GPU couldn't hold the performance of HDMI, so I used another old monitor with a VGA cable, I think it's faster and more sustainable, one more thing that I forgot to mention is that, my friend gave me a GTX 760 for a gift about a few years ago, I was wanting to slip it inside my PC, yet tragically the PSU just had a 6 PIN connector while the 760 required 12 Pins, however, it wasn't worth it in the first place, despite of performance benefits, the CPU would bottleneck.