World won't generate and lag is more prominant than ever

Im playing on the lowest graphics possible to prevent lag and keep a cap 30 fps, yet I still get lag that is just inexcusable, I was able to ignore it for a long time but even I'm starting to lose it, Withers are impossible to kill due to lag, blocks take like 20 seconds to load in when placing, audio delays occur soo often and more, as a veteran and an average Nintendo user I can deal with this kinda stuff, but to a normal gamer this would be demotivating to play, maybe it's because I'm in the late game but this shouldn't occur one way or another, I pray I'm not the only one who's dealing with this and I hope I can bring some awareness to this