Sims 4 full game glitch. Cannot select anything

hi all, 

I posted in another topic about having problems with my sims 4 game, to be clear i do not have mods in my game

I got rid of them a while back as they were causing too many problems.

I followed some instructions from a fellow member on here and found unfortunately it hasn't worked (i did it all down to a t, double checked i did everything correctly) 

the issue i keep having is a particular glitch which wont let me select items in cas (my mouse arrow will skim over but it glitches and i cant click on one side of items on the screen etc), click "load game" button, or even options with my sim as i am playing the game. i shall attach a video below. 

I have also noticed a new problem which is the gallery is incredibly slow.

it takes ages to load my profile, sims, other peoples creations, and will not allow me to download them.

it keeps saying "unable to locate [item/sim/lot] etc. and I'm getting to a point of feeling very fed up as i just have no end of problems. 

I feel i cannot enjoy this game anymore as i cant even play it without it throwing a hissy fit.

i have tried uninstalling/reinstalling, moving my old sims 4 folder to desktop, repairing the game and starting afresh.

i am unsure about if this glitch is due to a patch update or not, but its been like this on and off for the last few months. one minute the game works fine, the next it acts up like it is now.

if there is another way to fix the game please let me know.

**edit** - i now have to repair the game every single time before playing it so it works properly, which shouldn't be happening. and gallery is still not working.