2D Top down game issues

Okay so I’m trying to make this top-down 2d game and I’m having some issues 1st being (and that’s happening with every 2d game I’ve tried to make so far) every sprite every map, everything is like, flickering there are transparent stripes appearing and 2nd is that (I’m on flying mode right now) when I move into a corner like, any corner like collision It glitches as shown in the video, I think I tried everything and I don’t know what could cause this issues(sorry that it’s recorded with a phone obs really makes the ue4 recording a slide show) image_186355.gif

I think changing the capsule component to a box collision could help but I really don’t know how to do it