It looks to me like none of the walls are load bearing, so I would not be concerned about cracks in the walls, or between the walls and columns and or beams. Cracks in the actual beams and or columns, could be a concern.
Wall filler is fine for holes, but for cracks, I like TOA 302 acrylic sealant for cracks.
อะคริลิกอุดโป๊ว TOA 302 1 กก. สีขาว (homepro.co.th)
The sealant is flexible, the putty is not, so when the wall moves, the putty cracks, but the sealant stretches, so the cracks do not come back.
You likely tamped with your tamper, if you tampered with your tamper, it probably would not start.