Internet Drops - please help resolve ongoing issues

A bit long but want to be clear.

My internet and cable service has been up and down constantly for months.  Drops off multiple times per day (10+) for anywhere from 5 to 20 mins or more.  We have had techs out a few times and they do things and service will improve for a few hours or a day and then start failing again.  Latest example below.

• Internet dropping constantly as above and intermittent high pixelation on cable channels.
• Tech was out Monday this week and said something about low signal.
• Replaced the cable from the overhead connector at the pole to my house demarc.  Ran single cable, no connectors.  Said it was kinked and wrong type of wire.
• From previous tech's recommendation, I have also replaced cable from demarc through attic and dropped to equipment.  Single cable, no connectors or splitters.
• Only splitter is on end of cable next to equipment with short cable connecting to cable box and router.
• After Monday visit, all was working and no drops noted until next morning.  Drops returned and got more frequent over next 2 days.
• By yesterday (Thursday), the service completely stopped and was down most of the day.
• Thursday evening I connected the interior cable direct to router (eliminated splitter) and it connected and worked well.
• Replaced splitter with new identical spec unit (Antronix CMC2002H-A 2-Way Horizontal Splitter -3.5dB 5-1002 MHz) and everything worked well again (cable and internet)
• Within 3 hours issues returned.  Internet drops every 20 mins for a few mins and pixelation returned to tv.
• Reconnected cable direct to router only and no improvement.  Still dropping periodically today.

Note we had significant storm damage from hurricane Beryl a few months ago in the neighborhood (although not my house or immediately surrounding overhead lines) and I would say the problem has been worse since then but did exist before.

What can I do to get this resolved?  Don't have many provider options here unfortunately.