I install zima but upload speed is down
Traffic does not pass through zima. So it is not responsible of shaping, it only propagates your settings to the mikrotik that does the shaping.
So to fix the upload speed you may specify it correctly in your service plan settings and zima will propagate it to your mikrotik.
Hope this answers your question. If the issue you are facing is different, you may share further details or screenshot so we could guide you better.
