Hello, I've had this issues on and off for months (I always update ai sometimes it fixes it, sometimes it doesnt). I'm creating multiple size banners for web and other online assets, sometimes I get no issue what so ever, other times I get bluured images and text. It's not the images they are 300x300 dpi high quality, and I have saved this out in every way possible 150, 300 dpi you name it, ive doubled the size of the file sizes im allowed and it still happens. It's like some weird bug? I work with banners all day long so when it happens its a nightmare as you can imagine. I sometimes send the file to my co workers to save out and its fine then? Just me and my stupid apple mac? Or is ai out to get me! ANY help would be amazing
You need to ask program questions in the forum for the program you are using To ask in the forum for your program please start at https://community.adobe.com/ Moving from Using the Community (which is about the forums) to the correct forum... Mod
Don't get wrapped up in the ppi. It's completely irrelevant if you have specified dimensions in pixels in which to make your banners.
You first screen grab (although here it's upsampled) looks like what you would expect for a web graphic that's about 373 pixels high. That's not a lot to play with. And it looks like you exported with no anitaliasing.
I find the better approach is to render your finished graph at a higher resolution than you need, then use Photoshop's image resampling algorithms to get down to your final required size using whichever works best. e.g. attached is your higher res file reduced to 373 pixels high using the Bicubic Sharper (reduction) setting.