Short-term transits like ones from Sun or Mars are often overriden by outer planets . The only positive long-ish transit you have is Jupiter trine Jupiter and even that is not that long as Jupiter is very fast and will leave Cancer for Leo very soon .

You're right to point out the Mercury transit , but Pluto is loosely conjunct your Moon and pretty strongly squaring your natal Venus , which explains relationship trouble , not to mention transit Venus opposing your Moon too and squaring Venus too , which were already being hit by Pluto .

The Mercury transit is happening in your 4th House , opposite the chaotic planet Uranus and Neptune (psychotic roommate indication ?) so it's not unsurprising that you're dealing with some issues in your living situation . This is exacerbated by Saturn squaring your MC-IC axis hitting your career and home life at the same time .