There's certainly evidence of bias in climate science, but if anything it's been towards understating the effect [1]
[1] https://blogs.scientificamerican.com/observations/scientists...
[1] https://blogs.scientificamerican.com/observations/scientists...
change is real, damn this winter we got 15+ degree Celsius instead of the ten cm snow we usually got when I was a kid, the local effects are quite evident, and the trajectory spells real dangers, but past predictions were definitely overstating the effects, no wonder people have doubts about current predictions