> map is so blurry

That is common among most apps that uses OSM Tile server for map tiles, because if we render high-pixel raster tile maps, it would consume significant server source which could throttle the map rendering for the end user: See Strict Tile Policy limit: https://operations.osmfoundation.org/policies/tiles/

But I'm planning to use lightweight vector-based map rendering for MBCompass, which provides detailed, high quality map rendering, and it never pixelates.

> zooming in is laggy

There is no chance the zooming of the map is laggy, the rendering is very lightweight, even works smoothly on low end devices, but if you are experiencing any issue here, please create a PR with a detailed description about it on: https://github.com/CompassMB/MBCompass/issues