I was in a similar position to yourself.
Up until mid 2016 we had BT for our home telephone line and then a separate BT line for my office phone and broadband.
Broadband was painfully slow - so I upgraded to Super Fast Broadband which proved to be neither Super nor Fast! I could dial into a conference call or attend a WebEx, but I couldn't do both. The bill for my office line was consistently running at over £150 a month. I complained and they sent a BT engineer out who basically said that (a) the bandwidth was as good as I was going to get, and (b) there was no likelihood of ever getting BT Infinity.
Then the village where I live had Gigaclear installed so I signed up and I swapped over.
To say it is like night and day is an understatement. I now pay just over £50 per month for approx 200Mpbs line speed. It doesn't always hit that, but the days of worrying about speaking using a VOIP phone whilst on a web conference are long gone. Using Cloud for storage is now a reality, as is live streaming TV and films.
I still have the BT phone line into my office but the only calls that come in are asking me about the recent crash I was (not) involved in, so I will cancel that in the New Year too.
Gigaclear has had a few outages, but the difference in the way they handle these compared to BT is like chalk and cheese - I am notified via text if there is a problem, it is fixed in short order with text updates as necessary, and they contact me afterwards to tell me it is back up and running and to apologise for the temporary loss of service.
Hope this helps.