What's up with my meetings screen share?

[KiaG91]

It has been like this for about a month I logged into my schools zoom meeting. For about 30 minutes into the meeting I didn't have a problem came back to the meeting and my screen was very pixelated with the random colors and bright stripes that moved up and down the video. Ever since then every time I log in for my schools meeting it looks the same very colorful, choppy and the audio is horrible. I tried everything under the sun unfortunately my laptop is the main way I get on my zoom meeting and the laptop I have comes in S mode. So I've been using zoom through browser because my laptop will not allow me to download the actual zoom app.