Solar is easily the cheapest energy and its getting cheaper every year. Repairing a coal power plant is not as attractive as a much cheaper to run biofuel plant. Etc.

Here in germany we have investors abandoning half build solar parks cause they aren't profitable anymore.

Without knowing the specifics, I doubt profitability was the issue. Once a solar panel is installed it is pure profit with minimal maintenance. Companies get in trouble when they commit way more to a project than they can raise in investments. It seems more likely that is what happened.

Lastly your looking at a few countries that are pushing back with what amounts to theater (Germany is 56% renewable energy). Meanwhile the largest producer of energy in the world, China, is staying committed to converting to renewables and s also 56% of the way there.