I'm not sure what the genealogy of the different browsers in different ROMs are (and you didn't say *which* EE you were using), but I came to expect that the stock browser in both the HTC 1.5 and 2.1 official releases would crash on me at least that many times per day if I was using it heavily.
So, I would say that that is no worse than the stock browser.
I will say, though, that I was very surprised by the browser in Aloysius V12 - I used pretty much the same sort of browsing habits (same sites, same impatience with clicking on links or resizing before pages are fully loaded), and I can't remember it crashing on me even a single time. Aloysius is a Sprint-derived ROM iirc.
Right now I'm giving tazzpatriot's CM6/Froyo/ "V5" ROM a spin - it's browser seems noticeably faster at page rendering, but it is too soon to know whether it is as stable - but no crashes after a pretty full day of using it.
So, anyway, YMMV with different ROMs; but I can't imagine that the browsers in any of the dev ROMs are worse than the one that was in the stock HTC OS (either 1.5 or 2.1)
There was someone on this forum that hypothesized that disabling flash solved all of his browser crash problems (on OTA-2.1 pre July) - I tried that but it made no difference in the way that I was crashing the browser, so I disregarded it.
Sorry I'm not more help.
eu1