Considering that I keep them turned off even on a Core 2 Duo system running at 1.66GHz wit 2GB of RAM, yes, yes I would still hate them. Flash and Javascript have their uses, but the abuse of them is so utterly rampant that it's really easier to do without unless a site specifically requires them to function at all (and in that case, it's usually easier to just avoid the site if possible.)
I am not going into the "what if game" because that is childish and silly. However, with full honesty, even if we have a sophisticated and well optimized developers who develop the newest features for website it will eventually require a more powerful system to run them (even if you code it in 100% assembly). People need new technology and features in their website, business demand them to make things look professional and easier to develop. In the end, upgrading hardware is much easier than being stagnated in our software features just because we find that it takes too much from the hardware.
Amiga would have not have had all these problems had the company did not go under and had they always upgraded their hardware, always updated their software, improved in their security level and memory managed, worked in selling their computer as a good business machine and not just as a toy, and not have bickering, backstabbing, fighting, not fulfilling their promises and have history of developing bad Amiga models like A600 for example when A1200 was out, and if they have not made their A1200 so weak as will as their A4000 with it's limited chip RAM of 2 MB and still stuck in AGA...if they have not done all that...then perhaps the issue of a browser being too strong to run in an Amiga classic hardware would not have being a real issue.
Then people who like
bloated and fat features of a browser such as java and so forth would not be complaining that their hardware is not up to the bar. And people who hate fat and bloated java and HTML would disable it if they want...at LEAST we have a choice. At least it works...at least it runs..and maybe Amiga would have lived as a niche market of 1% and survived like Mac survived in a competition against Windows.