Welcome to the stream my man
The politics stream isn't really any better and I think is typically worse. A lot of people on both sides are angry right now, and that gets reflected in the memes that usually hit the front page of both streams. But I get where you're coming from. Democrats (and frankly Republicans too) need to offer a positive vision for the country. Our inability to do so is part of how we all lost our way.
I'd suggest you check out this new stream on ImgFlip founded to promote civil, nonpartisan political discussion and which I recently became a moderator of:
imgflip.com/m/Politics_Redux
I've been posting memes to the stream for a few weeks -- I (typically) stay away from the overt anti-Trump angle, although occasionally that does happen, because he is the President and often does deserve to be criticized.
There are some other political streams, but I haven't found any that are as active as these three.
Outside of politics, I'd also suggest you check out
imgflip.com/m/Peace_On_Imgflip and the many other positivity-oriented streams. I can provide more links if desired.
Once again welcome.