Major problems after moving to cloud and V11 - ECW support unhelpful

Nightmares and extremely slow EMR after the move to the cloud. We are having to wait several seconds after each click. Taking twice the time to see each patient. Every day 2 or 3 patients are walking out of the waiting room because of long wait times due to SLOW EMR.
I went for the move to cloud when they offered me a 3-year contract deal for two providers (but later refused to add the second provider unless I paid extra for the second provider addition).
We were not told that the documents would not open quickly. Having to wait several seconds for each document to open and wait several seconds while ECW becomes “unresponsive”. They blame it on the size of the document but they should have either looked into this before the move to the cloud or compressed the document files on their end.
The installation MSI file to install ECW on workstations is very flaky. Leaves lots of setting changes to be made by the user later requiring hours of work to make setting changes of exceptions to the firewall and windows settings etc on each workstations.
It allows users to scan driver licenses in color without giving warning popups to limit the size of the documents to a certain size. Had no trouble opening color image documents when we had the server in-house.
ECW support keeps blaming us for slow internet speed when they had tested the speed prior to move and we checked our speed to be very fast at 100/20. They blame us for not changing all the settings on workstations when we have made them and showed them to the support staff.
I am now stuck between rock and a hard place. Have buyer’s remorse and highly frustrated :(
I started my practice with all charting on Wordperfect when people had handwritten charts. I used to create typed prescriptions and print them out. That was all that was needed to circumvent the handwriting issues (even though I have excellent handwriting) but they have created a monster out of the EMRs wasting the doctor’s time. No wonder the MDs that were close to retiring are retiring fast. If only the students enrolling in medical schools knew that they are headed to become clerks and not doctors, they would think twice. What a shame.
If I had created an EMR, it would be highly intelligent and interactive.