You are watering it way too much. Monsteras need to need be soaked then allowed to completely dry out between waterings.

A larger pot allows for less frequent waterings. I only water mine monthly in the summer. Every 2-3 months in the winter.

They need fertilizer especially when putting out leaves. Yours is showing nitrogen deficiency. It’s a bit of a weird expression but monsteras are unique.

Light levels - they do best with 3-4 hours of direct sunlight every day. Generally it’s best to have those hours in the morning or evening.