I understand all the technical aspects, but there are other solutions to fix them

In fact there are not. Saying it or wishing it does not make it so.

We need to direct our efforts toward minimizing the toxicity and negative effects of a tool which, as with all tools, can be used for good or evil, but which is absolutely needed by the good. Probably that means education, so people understand that receiving a downvote is not a personal attack, it is another stakeholder expressing their legitimate opinion (and it is because all human beings have legitimate opinions whether you like them or agree with them or not) on how the reward pool should be allocated, and also reminding people that if you do not get the rewards you feel you deserve, it is not only the fault of the downvoters but also also the fault of other stakeholders who did not upvote enough.

Or more to the point, you did not produce a contribution which stakeholders, collectively (both upvoters and downvoters) deemed worthy of a larger payout. You can blame them, blame a subset of them (those evil, nasty downvoters!) or you can work harder and adapt and produce contributions which are more valued.