Ender 3 Refuses to work

Hi, I'm new to posting so please bear with me. In June 2018 i bought a creality ender3 and a few spools of ABS. After assembling it correctly, I put the printer in an enclosure and started a test print. It failed along with almost every print since then. So i bought an E3D light6, hobb goblin, Capricorn PTFE, and Buildtak. I also ended up buying a duet2 WiFi because the stock board went out. After months of tweaks it still didn't work. I'd buy a Prusa if i could do it over. Please help me fix my printer.
TIA, Andy from EstebanFPV