No, it won't trickle down. In fact, we're seeing the exact opposite, with an increasing proportion of wealth being concentrated into the top few percent (the top 1% in the UK own 24% of all wealth today). Sure, that wealth will pass on to the children of the wealthy, but it will never find its way into the hands of the poor without intervention.
The resentment for boomers stems from a variety of reasons (as well as for Xers as there's little distinction between the two in the eyes youth, hell, even early millennials are grouped into this now).
Before I start I want to make it clear that this is not personal attack on individuals, nor am I implying every boomer/xer had a easy, care free life. This is simply detailing the reasons I hear being voiced.
For some it's becuase that generation took a period of unprecedented peace, stability, growth and prosperity and chose to pursue a system that exploits the many for the benefit of a few rather than one that created a fairer and more equal world.
For some it's because that generation are the ones who oversaw the population explosion, began the extreme overconsumption of natural resources, decimated biodiversity and destroyed the environment (this is where Xers get brought in becuase they continued and exacerbated the situation).
For some it's because of the refusal of boomers/xers (as a generation) to accept that they made mistakes, that things aren't working, and that things need to change. This is compounded by the fact that it is largely the boomer and Xer generation who are in postions of power (senior management, government, etc) and they are often seen to acting as barriers to change by not implementing policies/changes that younger generations want too see.
Finally, for some it's because of how out of touch they appear to be about the realities and pressures of modern life and of life as a young person. That's largely down to the media but there's certainly an element of truth in to (if you want a house just stop buying Starbucks type thing).
I think things are so pronounced now because we are on the cusp of a societal shift or a societal collapse. Capitalism has advanced the human race immeasurable in the last 200 years or so but it has reached (I'd argue it exceeded) the limits of its current form and we will have to change willingly or not.
Boomers, Xers, and probably millennials represents the society of days past, while Gen Z and Gen Alpha will very likely be the lost generations of the transition period (unless we get out act together very quickly in which case they would be the first of a new age), hence the resentment.