There are some toxic companies where you’re just fucked… but assuming you work at a company that doesn’t love failure it’s our job (or maybe one of your senior’s jobs) to step in with a reality check and make sure product knows the scale of cost of a feature.

I’ve worked with extremely good and responsive PMs and I’ve worked with assholes. If you have yourself an asshole that doesn’t learn send estimates or comments in emails so you have a paper trail for the post mortem.