We have reached the point where net zero (or no more than say 10%?) is largely achievable given the right levels of investment. The tools that could be used to get there rapidly (a couple of decades at most) - grants, regulation, tax policy, finance etc etc exist.
Homes can be built to the best thermal standards with water recycling and PVs, diets can change to largely exclude meat products, green energy generation and EVs can eliminate ICE, most air travel is discretionary, most packaging can be recyclable, etc etc.
The main barrier is us - the public. Business is profit motivated and in a free market will invest in that which the customer demands. They see regulation as a constraint and lobby accordingly but it is public demand (and short termism) which ultimately motivates their lobbying.
We prefer democracy to dictatorship. Governments seeking to implement regulations which deny freedom of choice, reduce the immediate standard of living, increase costs etc will rapidly find itself in opposition. This constrains the speed of change to that which is publicly acceptable.
The climate change lobby, despite being IMHO broadly correct in its projections, has failed to convince sufficient of the public that major changes are needed - their science may be excellent (9/10), their capacity to influence outcomes is poor (3/10). Must do better.