Are we tackling anything in the last decade ?

If you e.g. look at power generation, then yes, that is being tackled. Incrementally and against a lot of resistance, from conservatives, fossil industries, nimbys, etc. Build-out rates for solar and wind worldwide are getting better. The last decade was not completely lost, it helped make these technologies cheaper and more scalable.

Do people look at the ever increasing graph of CO2 emissions worldwide ?

It is true, they do. And at face value, those rising emissions wouldn't be necessary, if climate change was given appropriate priority.

But we also have realistic projections that emissions will start falling before 2030.

Let's do our best to delay it but it's happening people.

Climate change is not binary. Rather there's a spectrum of outcomes. Of course climate change is happening and of course, the 1.5°C goal is unrealistic now (because we're basically there already we just can't say for sure yet). But it does matter that we do not make climate change even worse than it needs to be.

For relevance, here's one of those graphs: https://ourworldindata.org/co2-emissions
That tiny dent you see there is from Covid btw, which wrecked several of our economies, and that steep fall would have to continue all the way to 2035 for us to meet our actual climate targets. People who think we can tackle this are delusional and just don't want to accept the reality that we're heading towards.