people on my MC windows 10 world keep getting disconnected for no reason

People keep saying that the graphics are bad. That's true, but do people expect realistic graphics on a game where the world is made up of 1m cubes? I think MC is more technically taxing on hardware than people think.

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While a world like Skyrim is beautiful and big, MC worlds are multitudes bigger (on PC) and in either version, MC has to load not only the surface (including sometimes big mountains and forests) but also a huge underground filled
with blocks. It also has to be able to save and load every little change you ever make to any block in any part of its world; surface level, below it, or above it.

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Besides, some people have trouble running MC as it is, never mind better graphics. We don't all have money or reason to buy great computers.

They are playing mc bedrock on pc and i think they are on windows 10, also they can recieve the party invite but it wont let them join the world

It's like xbox support doesn't get it, many people all over the world are getting disconnected for no reason. Go to twitter.com and type "xbox live" in the search bar and click all. See how many people are getting disconnected.

I suggest people watch a gameplay video to get an idea. It is more about adventure but you can build some nice stuff too. MC is great but this game blows it out of the water when it comes to having a living world. MC feels kinda empty and there's not much
reason to explore. Terraria is very satisfying, totally worth it.

Right now, PS4 Bedrock Mincraft doesn't support Realms yet.

And Realms are the only way you can transfer your Worlds from one device family to another device family (in your case PS4 to Windows 10, or Switch or Xbox).

So in case PS4 Minecraft gets the necessary update to also support realms, you can either rent a Realm, or if it's a one time transfer you can start a free trial for a Realm.

Upload your PS4 world to the Realm after Realms become enabled, and then connect your Windows 10 device to the same Realm and download the world again.

Be aware that this "disconnects" the worlds, if you keep them locally on your devices. So changes you make on your Windows 10 device will not happen on your world stored on the Playstation 4.

If you want to keep the worlds "in sync" on both devices, you will have to pay rent for a Realm server, and store your world on the Realm server, and connect to that Realm with your devices.

Or you can keep the world on one device, and allow your other devices to connect to that world via Multiplayer. In that case the world is only available when the device is running Minecraft, of course.