Where can I read the chapters in a manga if those chapters are blurry and small in this we...

You could try the original scantalator's site? It's usually mentioned at the end of each chapter. If not, try mangaupdates, it might tell you somewhere on there.

There are websites such as mangakakalot and mangarock which are pretty reliable. You can also file a report to mangago to fix it while you’re at it and if its too small, you can zoom in.