I made an image with Photoshop. The text looks perfect in Photoshop but when I register it in .jpg or .png, the text looks blurry.
I tried everything, but nothing works. The font is Truetype, the resolution 72dpi, and I tried every aliasing setting, but that doesn't work either.
This in not blurriness, but the JPEG compression doing its thing. Strong colour contrasts between irregular shapes are always distorted like this by the compression in a .jpg. We call them 'artefacts'.
You could try to reduce the amount of JPEG compression. Increase the 'quality' slider when you export / save as a .jpg and the results should be better. The higher the quality, the less compression artefacts and the larger the file.
If all else fails, try and export a PNG-24 instead, but be warned that most social media will re-save a .png as a .jpg anyway, and re-compress it. Reintroducing your problem.