I am currently silver and I want know how to play marshal so if you have any advice i world like some to improve and any other advice for me since im stuck in silvert(i use shorty when I but marshal)thank you all very much

I just opened up valorant and i noticed that im suddenly getting only 90-100 fps in deatmatch when i used to hit 140+ is there anything i should be doing? i have all my settings on low