Please fix export SVG, Adobe illustrator, AI ruins vector graphics

I used AI to create vector graphics for a game for around 3 months, until now, I moved to Affinity designer until AI fix their SVG export 

In AI a problem was always present:
The SVG export.

Adobe Illustrator ruins SVG graphic files:
1. Gaps between shapes
2. Gradient color unwanted alterations
3. Layers might overlay incorrectly
4. Wrong transparency percentage
(All the above only after exporting in SVG format)
(I only work using vector graphics, so the issues are all for vector graphics)
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Please, fix vector graphic exporting in SVG format
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My best guess if this is not fixed soon is that Adobe company don´t want users to emigrate from their closed system of softwares, so they keep paying monthly for their unpolished programs, because currently exporting files properly is impossible, and any attemt ruin everything inside the file