Been trying to fix this for hours. My video quality is fine in the preview window in premiere but when exported, the video and titles are blurry. I've attached my export settings below.
I pressed match source in the export window and ticked render at maximum depth. Not sure if it's worth mentioning that I filmed the footage on an old camcorder from 2009ish where the footage has an MPEG-2 Codec.
The resolution of your Sequence is small. Are you previewing the exported file in full screen? If so, pixelation is expected because you're scaling up the video. Preview the file at 100% scale to see what Premiere Pro is exporting.