Long story short, what I want to say is that making an offer and complaining about getting it rejected does not make much sense
No one is complaining about it, they're pointing to the many generous and heartfelt attempts made, that were rebuffed, along with repeated statements that Israel should not exist.
This shows how unreasonable others are being, and how reasonable and open to resolving things Israel has been.
And that does matter.
Every country on the planet, every single piece of land, has people on it who displaced others. Yes, this includes the Palestinians too, they've displaced others, you just need go far enough back. Historical displacement is irrelevant, and only the oldest among us even remember a time when there was no modern Israel.
Israel belongs there too, Jews have lived in the region forever, and Jewish run states have existed for thousands of years in the region.
It's this simple. Israel exists, and is going nowhere.
People need to deal with it, drop historical hatred, and make peace.
Well you can't compensate a dead person, but you can compensate a living person. There is the cut-off from historical perspective. In this spirit, a single state allowing right of return and equal (voting) rights is a workable solution. Thing is, Israel currently is an apartheid state, so the status quo is not acceptable.
In addition, tens of thousands of civilian casualties within the country, and ignoring ICJ rulings which Israel have signed up to, indicate effectively a rogue government, needing change.
There is a question over what defines Israel as a state, there's no reason why Palestinians and Jews should not be able to live together, with a shared government, but that's not the case here, and that seems to be because Israelis are taking land, making asymmetric laws, allowing anyone with 'Jewish' heritage citizenship regardless of their actual location, and so on. The issue is basically Zionism and the fact that Zionism effectively mandates ethnic cleansing, not Judaism.
[...] generous and heartfelt attempts [...]
With the support of the United Nations and violence Israel took half of the land from the people living in Mandatory Palestine and displaced hundred thousands of them. And then occupied the rest of the land when they were fighting back. And terrorized and killed quite a few of them in the course of it. They better make a generous and heartfelt attempt to make good for that.
And with that I can just ask a similar question as before, where are those attempts that failed for unreasonable reasons? And I mean attempts that actually had a chance of getting implemented, backed by sufficient power to follow through if an agreement could be reached.
[...] along with repeated statements that Israel should not exist.
A good part of the people in power in Israel - not all of course - would similarly prefer if there was no Palestinian state, from Ben-Gurion who hopped that Israel will eventually encompass all of Mandatory Palestine to Netanyahu who rejects a fully sovereign Palestine.