Thank you for letting us know that you're also experiencing performance issues, MTL-CM.
I can see that my colleague, ZackE, Bryan_M, katherinejoyceO, CharleneMae_F have shared the steps to resolve performance issues. It's best if you can reach out to QBO Support so your QBO company will be checked and investigated further.
Please don't hesitate to reach back out if you have questions. Take care and have a good one.
