Realms unplayable with lag.

Marked 'Very Important' because the game is literally unplayable. 

The lag in realms with only 1 player signed in has gone from bad (periodically blocks wont break, things stop moving, then catch up), to unplayable-- animations not playing at all, entities jitter around instead of walk. 

No-one can get anything done on our realm-- a PAID FOR service, and I can't seem to get any support or help, either. 

It isn't our internet, let us make that abundantly clear. Several different people with varying levels of excellent down/up speeds all get the same result across several gaming rigs. It isn't my computer. I have a brand new MSI that came out just this year, and it does not come near touching my specs. 

It is only Minecraft that does this-- online AND offline-- but it's worst on realms, utterly unplayable. I tried to search for this issue here and all I got was topics from 2015 which was unhelpful.

I am at my wits end over the fact that I can't seem to even find any solution or help except other people saying the same things for 2 years with no solution. 

Do I really need to get a refund and give up on Minecraft because I really, really do not want to but there is absolutely no validation for spending the $30 label price and a recurring sub fee for something that is unplayable and with no person to person support from its devs.