What you're experiencing there is what is pretty typical from most altnets. They are rarely as stable as the Openreach style services - mostly because the latter is quite a mature setup and most altnets are still scrabbling around, building networks, learning etc.
People love to moan about Openreach & BT (sometimes quite rightly) but one of the reasons they're slower and more boring is that they've generally got better processes and network stability - I'm always very wary of altnets as our experience with several of them has proven they're not as robust. I'm sure in time it will change as they get consolidated into a couple of players, but for now... not gonna happen.
I doubt openreach fibre network is any better or worse than altnets, after all, as people keep saying here it is not the fibre that is the problem. even on Openreach network, people have problems. I had a problem a few years ago where only one Modem would sync confused openreach as they had no idea what the problem was. My iold ECI modem would not sync, or the router hub one from plusnet. they even sent me a Zyxel and that played up as well.
But that was the only main problem I had in the 9 years I was with plusnet, apart from a couple of slowdowns.
I am willing to give different things a try, after all I tried a wireless network at one point, still got the thing on my roof pointing towards our cathedral, if it had kept offering a decent service I would still be on it now maybe, but it was not cheap. £30 a month for 10Mb/s, but it was better than the awful 2.5Mb/s I had on ADSL., until they could not cope with the amount of customers. By the time my 2-year contract ended, we had FTTC available.
I am pleased there are Altnets around, it gives people more choice and by the seems of it they are taking customers away from Openreach, I doubt it will bother Openreach that much at the moment, but it still pleases me.
What needs to be done for a lot of these Altnets is better customer service and to keep their networks running. 18 days and 8 hours now since mine have disconnected, so that is pretty good and the last time it disconnected may have been a router thing, I noticed yesterday that my router was on auto update. See if it stays connected until the end of the month.
My other half have no problems with Gigaclear apart from their customer service is a bit iffy, but still mile better than BT and Talk Talk customer service which is appalling.
I wish altnets all the best, let's give people more choice
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,