Following view that skipping a single prayer without excuse is kufr, would praying an invalid prayer be kufr (since the invalid prayer is like a prayer that wasn’t prayed at all)? Like combining for no reason? What if someone goes with an easier view for ease (like Maliki view on dog saliva)?

Ustadh AbdulAziz al-Haqqan

If you suffer from waswas seek medical help.