Text in tables unreadable when viewed from mobile phone

Please take a look at this page, using your mobile phone (or a viewport simulator). As you can see the table alignment seems very off and the text becomes unreadable. https://www.zomerweidedag.nl/programma-2021/ Could you please explain how I would be able to fix this? If purchasing Pro would be required, could you please explain how I would be able to fix this when I have pro? Thanks in advance.