Idk what you're saying is incorrect here. Conservatives are by and large Anti-Labor which means they are anti-80-90% of the population. Merkel began decommissioning nuclear plants and put more money towards oil, now we have an energy "crisis" that could have been entirely avoided. But conservatives are pro-oil when everyone in the world would benefit from being pro-green energy including nuclear power.
Conservatives are by and large pro privatizing public functions. The German train network has the issues it has today partially because it's not publicly owned and operated. Conservatives are anti-infrastructural spending and they tend to be budget conscious only when it benefits the Uber wealthy.
Merz wants to complain about the fiscal budget but then wants to cut taxes for corporations. The CDU wants to fund that, last I checked, by cutting spending on welfare and social security nets. Conservatives want to take money from the sick, poor, and elderly and give it to big businesses and the only argument they have for why that could be a good thing is it could make the "economy better" and some of that money will trickle down.
We are in the mess we are today because of conservative policies. Voting for the CDU is voting for the declination of society based on all the data I've seen. I'd love to see what an SPD government looks like when it's not being sabotaged by the FDP but I worry, like in America, they're still too centralist to be massively effective at reversing decline.
Immigrants aren't the problem. Germany needs more immigrants to stay functional in the coming decades, just like most developed countries.