Shopify Marketplace Connect

9 Months trying to get this app to work. It's been hell.
5000 products missing.
eBay prices that don't match what I set the app to be.
Thousands of images missing.
Size & colour options are the wrong way around on many listings, so the colours aren't shown when selected.
Customer services, which used to be really good have gone downhill since Shopify acquired it - 16 days trying to get an issue sorted, with reply times of 24-30hrs.
It's recently been much quicker to use.... YAY ..... But nothing will actually save ..... spinny wheel of death.
It's working okay on Amazon at the mo, but I haven't been able to list anything to eBay for months.
Totally exacerbated, and I'm actually paying for this pain!