I have a raspberry pi 3 with latest OSMC (clean install 0 addons).
I have mpeg2 license.
I just put my m3u list into my PVR simple client, and channels take lots of time to open (almost 15 seconds each switch/play).
Unfortunately, it’s really rare for them to be ‘legit’. Usually if they are offering lots of different services at a price lower than the official channels, it’s not legal. E.g. if you can get HBO + Cinemax etc for less than the price of HBO, well there’s your answer.
The decision to use such services is personal. Unfortunately though, after looking at your logs I can’t see anything obvious.
Try Kodi on your PC to rule out a platform issue etc. You will have more luck with IPTV add-on developers and who sold you this package
Anyone who provides you a list of 789 channels (virtually every channel known on the planet) and includes premium pay network channels and bypasses the geoblocking native to legitimate IPTV channels, is a pirate.
How can you suspect that they are not pirates? If it was legit, why wouldn’t everyone be paying pennies for such a service?